Best Time to Trek Annapurna Circuit: The Complete Month-by-Month Guide

Timing the Annapurna Circuit is arguably more critical than any other trek in Nepal. Unlike shorter treks where you can push through poor weather for a few days, the circuit demands 12-21 days of commitment with a 5,416m pass crossing that becomes genuinely dangerous in bad conditions. Choose the wrong month, and you're facing whiteout conditions at Thorong La, monsoon-swollen rivers with washed-out bridges, or bitter cold that turns the high camp into an endurance test.

Choose the right month, and the Annapurna Circuit delivers one of Earth's most spectacular trekking experiences: walking through four climate zones from subtropical rice paddies to alpine desert, crossing the world's longest and deepest valley, standing atop Thorong La with 360-degree Himalayan views stretching from Annapurna to Dhaulagiri to the peaks of Mustang.

The circuit's unique geography creates dramatically different conditions on its eastern and western sides. The Marshyangdi valley approach receives full monsoon impact, while the Kali Gandaki descent sits in a rain shadow. October weather differs from May weather as much as spring differs from winter. And Thorong La Pass—the crux of the trek—creates its own microclimate with conditions that can shift from clear skies to whiteout in hours.

This comprehensive guide breaks down all twelve months with specific data for temperatures, precipitation, pass conditions, crowd levels, and realistic assessments of what to expect. Whether you're planning a year in advance or have flexibility to choose your ideal window, this guide provides the detailed information you need to time your circuit perfectly.

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Quick Answer: When Should You Trek the Annapurna Circuit?

For the vast majority of trekkers, October-November or late March-April are the best times to trek the Annapurna Circuit.

These periods offer stable weather, clear Thorong La Pass conditions, good visibility, manageable temperatures, and full teahouse operations. The circuit is technically possible year-round, but conditions outside these windows require serious preparation, flexibility, or acceptance of compromised experiences.

| Priority | Best Choice | Why | |----------|-------------|-----| | Best overall conditions | October-November | Post-monsoon clarity, stable weather, best Thorong La conditions, excellent visibility | | Best weather + fewer crowds | Late March | Pre-spring warmth, stable conditions, significantly fewer trekkers than April | | Warmest temperatures | May | Comfortable high camp nights, warm days, but increasing clouds | | Clearest mountain views | October | Post-monsoon crystal clarity, stable high pressure, minimal clouds | | Lowest prices | December-February, July-August | Off-season discounts (30-50%), negotiable rates, quiet teahouses | | Fewest crowds | January-February | True solitude, empty trails, peaceful experience (but very cold) | | Best photography | October, late March-April | Sharp visibility, dramatic lighting, stable conditions | | Safest Thorong La crossing | October-November | Most stable pass conditions, predictable weather windows |

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Understanding the Circuit's Unique Climate Patterns

Before diving into month-by-month analysis, it's crucial to understand why the Annapurna Circuit experiences such varied conditions—and why timing matters more here than on shorter treks.

The Rain Shadow Effect

The circuit's route creates a dramatic climate journey. The eastern approach via Besisahar and the Marshyangdi valley sits fully exposed to monsoon weather systems from the south. During June-August, this side receives heavy rainfall, turning trails muddy and obscuring mountain views.

As you cross Thorong La and descend into the Kali Gandaki valley (west side), you enter a rain shadow. The Annapurna and Dhaulagiri massifs block monsoon clouds, creating dramatically drier conditions. Jomsom, Kagbeni, and Muktinath receive a fraction of the precipitation that falls on Manang.

Practical Impact: During monsoon, the Marshyangdi approach becomes challenging while the Kali Gandaki descent remains relatively dry. In winter, the western side's dryness combines with cold to create near-desert conditions.

Thorong La's Microclimate

At 5,416m, Thorong La creates its own weather patterns. The pass sits exposed to high-altitude winds, rapid weather changes, and conditions that can deteriorate in hours. Even during stable autumn weather, the pass can experience:

• Morning temperatures of -15°C to -20°C (October-November)
• Wind chill reducing effective temperatures by 10-15°C
• Afternoon cloud build-up obscuring the route
• Sudden snowfall even in "dry" seasons
• Whiteout conditions that make navigation dangerous

Practical Impact: Thorong La conditions determine circuit feasibility more than any other factor. A stable weather window for crossing is essential—you can't simply push through like lower passes.

Elevation Extremes: Four Climate Zones

The circuit traverses from 800m (Besisahar) to 5,416m (Thorong La) and back down to 1,160m (Nayapul). You'll walk through:

1. Subtropical zone (800-2,000m): Rice paddies, humid forests, monsoon-affected
2. Temperate zone (2,000-3,000m): Pine and rhododendron forests, moderate climate
3. Subalpine zone (3,000-4,000m): Thinning vegetation, increasing dryness
4. Alpine zone (4,000-5,416m): Barren terrain, extreme cold, high-altitude conditions

Practical Impact: Weather at Besisahar tells you nothing about conditions at Manang or Thorong La. You'll pack for multiple climates simultaneously.

East-West Temperature Differences

Manang (3,540m, east side) and Muktinath (3,800m, west side) sit at similar elevations but experience different conditions:

• Manang: Wetter during monsoon, more moderate temperatures, fuller vegetation
• Muktinath: Drier year-round, more extreme temperature swings, sparse vegetation

Practical Impact: Your experience changes dramatically when you cross the pass, even within the same trek.

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Month-by-Month Complete Analysis

January: Deep Winter Circuit

Overall Rating: 5/10 | Thorong La Difficulty: 9/10 (Extreme Cold)

January represents the circuit at its coldest and quietest. This is serious winter trekking requiring proper gear, experience, and mental preparation for extreme temperatures. However, it also offers unmatched solitude and dramatic snow-covered landscapes.

Temperature Data

| Location | High | Low | Night at High Camp | |----------|------|-----|-------------------| | Besisahar (800m) | 18°C (64°F) | 5°C (41°F) | - | | Manang (3,540m) | 5°C (41°F) | -10°C (14°F) | - | | Thorong Phedi/High Camp | -5°C (23°F) | -20°C (4°F) | -20°C to -25°C | | Thorong La Pass (5,416m) | -15°C (5°F) | -25°C (-13°F) | - | | Muktinath (3,800m) | 6°C (43°F) | -12°C (10°F) | - |

Wind Chill: Expect effective temperatures 10-15°C colder at Thorong La due to high-altitude winds.

Weather Conditions

Precipitation: Very low. January is dry across the circuit, with occasional light snowfall at high elevations. Most days are clear.

Visibility: Excellent. Cold, dry air produces crystal-clear mountain views with exceptional clarity. Post-winter skies rival October for photographic quality.

Trail Conditions:

• Lower elevations (Besisahar to Chame): Dry, good conditions
• Mid elevations (Chame to Manang): Possible snow/ice on trail, crampons may help
• High elevations (Manang to Thorong La): Significant snow accumulation, trail may be icy
• Thorong La: Deep snow possible, trail-breaking may be required, ice on descent to Muktinath

Pass Conditions: Passable but extremely cold. The main challenge is temperature, not precipitation. Early morning starts (3-4 AM) mean summiting in -20°C to -25°C temperatures. Some years see heavy snowfall that closes the pass temporarily.

Crowds and Logistics

Trekker Numbers: Very low. You may see only 5-15 other trekkers on the entire circuit. Some days you'll have trails entirely to yourself.

Teahouse Operations: Most teahouses remain open on the main circuit route, but some close in remote sections. High Camp Lodge may have limited services. Prices often drop 30-50% due to low demand.

Services: Fewer dining options (many teahouses close their restaurants, offering basic dal bhat only), limited menu variety, but you'll find accommodation throughout the main route.

What to Expect: The Reality

The Good:

• Absolute solitude—peaceful, meditative trekking
• Crystal-clear mountain views with exceptional visibility
• Dramatic snow-covered landscapes, especially above 3,500m
• Lowest prices of the year (significant savings on accommodation, guides, porters)
• Personal attention from teahouse owners
• Incredible photography opportunities with snow and clear skies
• Quiet, uncrowded Thorong La crossing (if passable)

The Challenging:

• Extreme cold at high elevations requiring serious winter gear
• Night temperatures at High Camp can hit -25°C
• Unheated teahouse rooms (heating costs extra, often 500-1000 NPR/night)
• Limited hot water availability
• Shorter daylight hours (darkness by 5:30 PM)
• Risk of pass closure due to heavy snowfall
• Some teahouses closed, reducing accommodation flexibility
• Harder acclimatization in cold conditions
• Higher calorie requirements due to cold

Best For: Experienced winter trekkers comfortable with extreme cold, those seeking complete solitude, photographers wanting dramatic winter landscapes, budget-conscious trekkers willing to endure harsh conditions.

Not For: First-time Himalayan trekkers, those without proper winter gear, anyone uncomfortable with -20°C+ temperatures, trekkers with tight schedules (pass closure risk).

January Thorong La Crossing Strategy

• Start time: 3:00-4:00 AM from High Camp (earlier than other seasons due to afternoon weather)
• Expected duration: 6-8 hours to Muktinath
• Critical gear: Headlamp, microspikes/crampons, full winter layering, emergency supplies
• Weather window: Check with teahouse staff about upcoming weather; wait for clear forecasts
• Backup plan: Build 2-3 buffer days; be prepared to wait or turn back

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February: Late Winter Transition

Overall Rating: 6/10 | Thorong La Difficulty: 8/10 (Very Cold)

February marks the tail end of winter with gradually improving conditions. Temperatures remain very cold, especially at night, but daylight hours increase and the worst of winter cold begins to ease by month's end.

Temperature Data

| Location | High | Low | Night at High Camp | |----------|------|-----|-------------------| | Besisahar (800m) | 20°C (68°F) | 6°C (43°F) | - | | Manang (3,540m) | 6°C (43°F) | -8°C (18°F) | - | | Thorong Phedi/High Camp | -3°C (27°F) | -18°C (0°F) | -18°C to -22°C | | Thorong La Pass (5,416m) | -12°C (10°F) | -22°C (-8°F) | - | | Muktinath (3,800m) | 8°C (46°F) | -10°C (14°F) | - |

Trend: Late February (last week) sees noticeable warming, especially at lower elevations.

Weather Conditions

Precipitation: Very low to low. February remains largely dry with occasional light snow at high elevations. Precipitation increases slightly toward month end as spring approaches.

Visibility: Excellent. Similar to January, cold dry air provides exceptional clarity. Some of the year's best mountain photography happens in late February.

Trail Conditions:

• Lower elevations: Dry, excellent conditions
• Mid elevations: Decreasing snow compared to January, but still possible above 3,000m
• High elevations: Snow on trail, potentially icy sections
• Thorong La: Snow accumulation (less than January), better trail definition as more trekkers break trail

Pass Conditions: Gradually improving from January. Still very cold but more stable. Late February has better odds of clear pass conditions compared to early February.

Crowds and Logistics

Trekker Numbers: Low, but increasing through the month. Early February remains very quiet (similar to January). Late February sees the first wave of spring trekkers arriving.

Teahouse Operations: Nearly all teahouses open by mid-February anticipating spring season. Services improve compared to January.

Services: Expanding menu options, more reliable hot water, better heating availability (though still costs extra).

What to Expect: The Reality

The Good:

• Excellent visibility and clear skies
• Increasing daylight hours compared to January
• Still quiet trails with minimal crowds (especially early February)
• Better prices than peak season (20-40% lower)
• Gradually warming temperatures, especially late month
• Good snow conditions for dramatic photography without extreme January cold
• More stable Thorong La conditions than deep winter

The Challenging:

• Still very cold at high elevations (proper winter gear required)
• Night temperatures at High Camp remain brutal
• Unheated rooms common (heating costs extra)
• Short daylight hours early month (improving toward month end)
• Pass closure risk still exists, though lower than January
• Cold makes acclimatization harder

Best For: Winter trekkers seeking slightly milder conditions than January, photographers wanting snow landscapes without extreme cold, budget travelers comfortable with cold, those seeking solitude with marginally better weather.

Not For: First-timers to high-altitude trekking, cold-sensitive trekkers, those without proper winter gear, anyone unwilling to pay for room heating.

February Packing Essentials

• Sleeping bag: -20°C to -25°C rated (critical for High Camp)
• Insulated jacket: Down or synthetic, rated for -15°C minimum
• Base layers: Merino wool or synthetic, medium to heavy weight
• Insulated pants: For high camp and pass day
• Winter gloves: Inner liner + insulated outer gloves
• Warm hat: Wool or synthetic, covering ears
• Face protection: Balaclava or buff for pass day winds
• Insulated boots: Winter-rated with good ankle support
• Microspikes or crampons: For icy trail sections
• Hand/toe warmers: Chemical warmers for pass day

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March: Spring Awakening

Overall Rating: 8/10 | Thorong La Difficulty: 6/10 (Moderate)

March represents the circuit's transition from winter to spring. Early March still feels wintery above 3,500m, but by late March, spring warmth arrives and conditions shift dramatically. This is one of the circuit's best months, particularly the last two weeks.

Temperature Data

| Location | Early March High/Low | Late March High/Low | |----------|---------------------|---------------------| | Besisahar (800m) | 22°C/8°C (72°F/46°F) | 25°C/10°C (77°F/50°F) | | Manang (3,540m) | 8°C/-6°C (46°F/21°F) | 12°C/-2°C (54°F/28°F) | | Thorong Phedi/High Camp | 0°C/-15°C (32°F/5°F) | 4°C/-10°C (39°F/14°F) | | Thorong La Pass (5,416m) | -10°C/-20°C (14°F/-4°F) | -6°C/-15°C (21°F/5°F) | | Muktinath (3,800m) | 10°C/-8°C (50°F/18°F) | 14°C/-4°C (57°F/25°F) |

Temperature Trend: Significant warming through the month, especially noticeable at lower elevations.

Weather Conditions

Precipitation: Low to moderate. March remains relatively dry, though occasional spring storms can bring snow to high elevations (above 4,000m). Late March sees increasing afternoon cloud development.

Visibility: Excellent in early March (winter clarity), very good in late March (slight haze development as spring progresses).

Trail Conditions:

• Lower elevations (800-2,500m): Excellent, dry trails
• Mid elevations (2,500-3,500m): Good conditions, snow melting rapidly through month
• High elevations (3,500m+): Early March has snow/ice; late March mostly clear with occasional patches
• Thorong La: Early March can have significant snow; late March usually has clear trail with isolated snow patches

Pass Conditions: Improving dramatically through the month. Early March still requires winter preparedness; late March approaches spring conditions with much better temperatures and stability.

Crowds and Logistics

Trekker Numbers:

• Early March: Moderate (building from February's low numbers)
• Late March: High (spring season in full swing)
• Overall: Significantly fewer crowds than April (40-50% less)

Teahouse Operations: All teahouses open and fully operational. Full menus, reliable hot water, good services.

Services: Complete services throughout the circuit. Shops, bakeries, and restaurants all operating.

What to Expect: The Reality

The Good:

• Excellent weather stability, particularly late March
• Warming temperatures make high camp far more comfortable
• Crystal-clear visibility, especially early month
• Significantly fewer crowds than April/May
• All teahouses open with full services
• Lower rhododendrons beginning to bloom (below 2,500m by late March)
• Good Thorong La conditions with manageable temperatures
• Longer daylight hours
• Stable high-pressure weather systems

The Challenging:

• Early March still cold at night (winter gear needed)
• Occasional spring storms at high elevations
• Afternoon clouds increasing through the month
• Prices beginning to rise toward peak season rates
• Some snow possible at Thorong La (early March)
• Trail can be icy in shaded sections (early/mid March)

Best For: First-time circuit trekkers wanting reliable conditions, those seeking good weather without October/April crowds, photographers wanting clear visibility, trekkers wanting comfort without extreme cold.

Not For: Trekkers seeking complete solitude (late March gets busy), extreme budget travelers (prices approach peak season), those wanting guaranteed snow-free conditions (early March).

March Month Breakdown

Early March (March 1-15):

• Still feels wintery above 3,500m
• Requires winter sleeping bag (-15°C to -20°C rated)
• Excellent visibility, winter-like clarity
• Fewer crowds, quieter trails
• Snow possible at high elevations
• Good value pricing

Late March (March 16-31):

• Spring warmth arriving
• Sleeping bag requirements decrease (-10°C rating sufficient)
• Visibility remains excellent
• Crowds increasing (but manageable)
• Rhododendrons blooming at lower elevations
• Thorong La conditions optimal
• Approaching peak season pricing

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April: Peak Spring Season

Overall Rating: 9/10 | Thorong La Difficulty: 5/10 (Moderate-Easy)

April is universally considered one of the two best months for the Annapurna Circuit (alongside October). Spring conditions reach their peak with warm temperatures, stable weather, excellent visibility, and full services. The trade-off is higher crowds and peak-season pricing.

Temperature Data

| Location | High | Low | Night at High Camp | |----------|------|-----|-------------------| | Besisahar (800m) | 28°C (82°F) | 12°C (54°F) | - | | Manang (3,540m) | 15°C (59°F) | 2°C (36°F) | - | | Thorong Phedi/High Camp | 8°C (46°F) | -6°C (21°F) | -6°C to -10°C | | Thorong La Pass (5,416m) | -2°C (28°F) | -10°C (14°F) | - | | Muktinath (3,800m) | 16°C (61°F) | 0°C (32°F) | - |

Temperature Feel: Comfortably warm at low/mid elevations, pleasant at high elevations, cold but manageable at pass.

Weather Conditions

Precipitation: Low to moderate. April is relatively dry with occasional afternoon showers, especially late month as pre-monsoon patterns begin developing. Early April is drier than late April.

Visibility: Very good to excellent. Morning clarity is superb; afternoons can develop haze and clouds, particularly late month. Best views before 11 AM.

Trail Conditions:

• All elevations: Excellent, dry trails throughout
• Snow: Minimal to none except possible patches above 4,500m
• Trail state: Best conditions of the year—dry, well-defined, easy navigation

Pass Conditions: Optimal. April offers some of the year's best Thorong La conditions—manageable temperatures, stable weather, clear trails, good visibility, and predictable weather windows.

Crowds and Logistics

Trekker Numbers: High to very high. April is peak spring season with trails busy, especially the Manang to Thorong La to Muktinath section. Expect to see 50-100+ trekkers per day on popular sections.

Teahouse Operations: Fully operational, often fully booked. Advance booking recommended for Manang, Thorong Phedi, High Camp, and Muktinath during peak April weeks (April 10-25).

Services: Complete services, full menus, all facilities operating. However, popular teahouses may feel crowded or full.

What to Expect: The Reality

The Good:

• Excellent weather stability and reliability
• Comfortable temperatures throughout (except High Camp nights)
• Outstanding Thorong La conditions—safe, clear, manageable
• All services fully operational with complete menus
• Lower elevations warm and pleasant
• Rhododendrons in full bloom (especially 2,000-3,500m elevations)
• Long daylight hours
• Reliable weather windows for pass crossing
• Well-maintained trails
• Strong trekking community/social atmosphere

The Challenging:

• High crowds—trails can feel congested
• Peak season pricing (no discounts)
• Popular teahouses often full, requiring advance booking
• Less solitude and wilderness feel
• Afternoon clouds increasing through month
• Pre-monsoon haze developing late April
• Dust on lower trails from high foot traffic

Best For: First-time circuit trekkers, those prioritizing reliable weather over solitude, trekkers who enjoy social trail atmosphere, anyone wanting optimal pass conditions, photographers seeking rhododendron blooms.

Not For: Solitude-seekers, budget travelers (no off-season discounts), those who dislike crowded trails, trekkers bothered by busy teahouses.

April Thorong La Crossing

Optimal Crossing Window: Early to mid-April (April 5-20) offers the most stable conditions.

Start Time: 4:00-5:00 AM from High Camp

Expected Duration: 5-7 hours to Muktinath

Conditions: Generally excellent. Clear mornings, stable weather, well-trafficked trail (easy to follow), manageable temperatures.

Success Rate: Very high (95%+) due to stable weather and good conditions.

Critical Note: Even in optimal April conditions, start early. Afternoon weather can deteriorate, and you want to complete the crossing with morning clarity.

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May: Pre-Monsoon Warmth

Overall Rating: 7.5/10 | Thorong La Difficulty: 5/10 (Moderate-Easy)

May is the warmest month for circuit trekking, offering comfortable temperatures even at high camp. However, increasing clouds, afternoon haze, and building pre-monsoon weather patterns make it less ideal than April. Early May is significantly better than late May.

Temperature Data

| Location | High | Low | Night at High Camp | |----------|------|-----|-------------------| | Besisahar (800m) | 30°C (86°F) | 16°C (61°F) | - | | Manang (3,540m) | 18°C (64°F) | 4°C (39°F) | - | | Thorong Phedi/High Camp | 12°C (54°F) | -3°C (27°F) | -3°C to -6°C | | Thorong La Pass (5,416m) | 2°C (36°F) | -6°C (21°F) | - | | Muktinath (3,800m) | 18°C (64°F) | 2°C (36°F) | - |

Temperature Feel: Warm to hot at low elevations (potentially uncomfortable midday), pleasant at mid elevations, comfortable at high elevations and pass.

Weather Conditions

Precipitation: Moderate and increasing. May sees increasing pre-monsoon rainfall, particularly late month. Afternoon showers become common. Early May is drier; late May can feel monsoon-like at lower elevations.

Visibility: Good in mornings, decreasing through day. Increasing humidity and pre-monsoon haze reduce the crystal clarity of autumn/spring. Mornings offer best mountain views; afternoons often cloudy.

Trail Conditions:

• Lower elevations: Dry but dusty; hot midday conditions
• All elevations: Good trail conditions overall
• Late May: Lower trails may become muddy from afternoon rains
• Thorong La: Clear, dry, excellent conditions

Pass Conditions: Good to very good. Warm temperatures make crossing comfortable. Main challenge is afternoon cloud build-up, making early starts essential.

Crowds and Logistics

Trekker Numbers: High (peak season continues), though slightly fewer than April. Late May sees crowds beginning to decrease as monsoon approaches.

Teahouse Operations: Fully operational. Booking still recommended for popular stops, though less competitive than April.

Services: Complete services throughout. All facilities operating.

What to Expect: The Reality

The Good:

• Warmest temperatures of the trekking seasons
• Comfortable nights at High Camp (warmest you'll get at 5,000m)
• Good Thorong La conditions with manageable cold
• All services operational
• Rhododendrons still blooming at higher elevations (3,000-3,500m)
• Long daylight hours (longest of the year)
• Lush green forests, flowing waterfalls
• Good weather windows for pass crossing (early month)

The Challenging:

• Increasing afternoon clouds obscuring mountain views
• Pre-monsoon haze reducing visibility and photography quality
• Hot, potentially uncomfortable conditions at low elevations (below 2,000m)
• Afternoon rain showers becoming frequent (late May)
• Dusty trails from high traffic and dry conditions
• Increasing humidity
• Less crystal-clear visibility than autumn/early spring
• Late May can feel transitional toward monsoon

Best For: Trekkers who prefer warm weather, those with May-only availability, people who dislike cold high camps, photographers focusing on lush green landscapes rather than crisp mountain views.

Not For: Those seeking crystal-clear mountain views, trekkers bothered by hot conditions, anyone hoping for autumn-like clarity, photographers wanting sharp peak visibility.

May Strategy: Early Mornings Essential

May trekking demands early starts. Mountain views disappear by 10-11 AM as clouds build. Your daily routine should be:

• Wake: 5:30-6:00 AM
• Start walking: 7:00 AM latest
• Morning walk: Best light and visibility
• Arrive next stop: By 12:00-1:00 PM before afternoon clouds
• Afternoon: Rest, relax as clouds build and possible rain arrives
• Thorong La crossing: Start 4:00-4:30 AM to complete before afternoon weather

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June: Early Monsoon

Overall Rating: 3/10 | Thorong La Difficulty: 6/10 (Moderate, Weather-Dependent)

June marks the monsoon's arrival to Nepal. While the circuit remains technically passable, conditions deteriorate significantly, particularly on the eastern approach via the Marshyangdi valley. This is the beginning of off-season trekking with serious challenges.

Temperature Data

| Location | High | Low | Precipitation | |----------|------|-----|---------------| | Besisahar (800m) | 30°C (86°F) | 20°C (68°F) | Heavy rain likely | | Manang (3,540m) | 18°C (64°F) | 6°C (43°F) | Moderate rain | | Thorong Phedi/High Camp | 12°C (54°F) | 0°C (32°F) | Light rain/snow possible | | Thorong La Pass (5,416m) | 4°C (39°F) | -4°C (25°F) | Snow possible | | Muktinath (3,800m) | 18°C (64°F) | 4°C (39°F) | Light rain (rain shadow) |

Temperature Feel: Warm and humid at low elevations, pleasant at mid-high elevations, cool at pass.

Weather Conditions

Precipitation: High on eastern approach (Besisahar to Manang), moderate to low on western side (Muktinath to Jomsom). The rain shadow effect becomes very apparent.

• Marshyangdi valley: Heavy afternoon/evening rains expected, occasional all-day rain
• Manang area: Moderate rainfall, increasing through month
• Thorong La: Possible snowfall, particularly during storms
• Kali Gandaki valley: Significantly drier due to rain shadow, though not rain-free

Visibility: Poor to fair. Clouds dominate, especially afternoons. Mountain views are limited, often obscured. Expect clouds from 2,000m upward.

Trail Conditions:

• Lower Marshyangdi (800-2,000m): Muddy, slippery, leeches common in forests
• Mid elevations (2,000-3,500m): Wet, muddy in places, challenging footing
• High elevations (3,500m+): Better drainage, less mud, but slippery when wet
• Thorong La: Can be snow-covered; conditions variable and weather-dependent
• Kali Gandaki descent: Drier conditions, better trails (rain shadow effect)

Pass Conditions: Variable and unpredictable. Some years see clear crossing windows; other years experience persistent cloud and snow. Flexibility essential.

Crowds and Logistics

Trekker Numbers: Very low. June sees dramatic drop in trekkers—maybe 10-20% of April numbers. Some days you may be alone or see only handful of others.

Teahouse Operations: Most main route teahouses stay open, but some remote lodges close. Services are reduced, menus limited, but basic accommodations available.

Services: Reduced but functional. Expect basic dal bhat menus, limited Western food options, fewer bakeries/cafes open.

What to Expect: The Reality

The Good:

• Empty trails, true solitude and peaceful trekking
• Lowest prices of the year (30-50% discounts)
• Lush, green forests with flowing waterfalls
• Wildflowers at mid-high elevations
• Warm temperatures (no extreme cold)
• Personal attention from teahouse staff
• Cultural immersion (fewer tourists means more authentic interactions)
• Rain shadow effect makes western side relatively pleasant

The Challenging:

• Heavy rain on eastern approach, particularly below 3,000m
• Leeches in forested sections (2,000-3,000m)—common and persistent
• Obscured mountain views (clouds from midday onward, often all day)
• Muddy, slippery trails
• Higher landslide risk on road sections
• Possible Thorong La closure due to snow
• Limited teahouse services and menu options
• Wet gear constantly (clothes, boots rarely fully dry)
• Flight delays/cancellations due to weather
• Difficult photography (poor visibility, flat lighting)

Best For: Experienced trekkers comfortable with monsoon conditions, extreme budget travelers, solitude-seekers willing to sacrifice views, adventurous souls who don't mind rain and mud.

Not For: First-time Himalayan trekkers, anyone prioritizing mountain views, photographers seeking clear peaks, those with tight schedules (flight delays common), trekkers bothered by leeches or mud.

June Survival Strategies

Leech Protection:

• Leech socks (mandatory for forested sections 2,000-3,000m)
• Long pants tucked into socks
• Insect repellent with DEET
• Check legs/ankles regularly during breaks
• Salt or tobacco to remove attached leeches

Wet Weather Gear:

• Quality rain jacket and rain pants (essential, not optional)
• Waterproof backpack cover
• Dry bags for clothes, electronics, sleeping bag
• Quick-dry clothing only (cotton takes forever to dry)
• Extra pairs of socks (rotate wet/dry pairs)
• Waterproof boots with good tread

Timing Strategy:

• Morning starts to avoid afternoon/evening rain peaks
• Shorter daily stages (weather makes hiking slower)
• Build extra rest days for weather delays
• Be flexible with itinerary (Thorong La may require waiting)

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July-August: Peak Monsoon

Overall Rating: 2/10 | Thorong La Difficulty: 7/10 (Weather-Dependent, Variable)

July and August represent the monsoon's peak intensity. These are the circuit's most challenging months with the highest rainfall, worst visibility, greatest landslide risk, and most unpredictable conditions. Only seriously adventurous or budget-constrained trekkers should consider these months.

Temperature Data (Similar for July-August)

| Location | High | Low | Conditions | |----------|------|-----|------------| | Besisahar (800m) | 28°C (82°F) | 20°C (68°F) | Very humid, heavy rain | | Manang (3,540m) | 16°C (61°F) | 8°C (46°F) | Moderate rain, cloudy | | Thorong Phedi/High Camp | 10°C (50°F) | 2°C (36°F) | Cool, possible rain/snow | | Thorong La Pass (5,416m) | 2°C (36°F) | -2°C (28°F) | Variable, snow possible | | Muktinath (3,800m) | 16°C (61°F) | 6°C (43°F) | Light rain (rain shadow) |

Temperature Feel: Warm and muggy at low elevations, comfortable at mid-high elevations, cool to cold at pass depending on weather.

Weather Conditions

Precipitation: Very high on eastern approach, moderate on western side.

• Marshyangdi valley (Besisahar to Manang): Expect rain most days, often heavy afternoon/evening downpours, occasional all-day rain
• Manang area: Regular rainfall, cloudy most days
• Thorong La: Snow during storms, clear windows possible between systems
• Kali Gandaki valley: Noticeably drier (rain shadow), though still receives some precipitation

Visibility: Poor. Clouds dominate from mid-elevations upward. Clear mountain views are rare and fleeting. Expect obscured peaks most days.

Trail Conditions:

• Lower elevations (800-2,500m): Very muddy, slippery, challenging footing, leeches abundant
• Mid elevations (2,500-3,500m): Muddy in places, wet rocks, slippery sections
• High elevations (3,500m+): Better drainage but wet, possible snow above 4,500m
• Road sections: Landslide risk (roads can be blocked for hours or days)
• Thorong La: Variable from clear to snow-covered depending on recent weather

Pass Conditions: Highly variable. Some trekkers cross in good conditions during clear windows between storms. Others face snow, clouds, and difficult conditions. Impossible to predict; flexibility essential.

Crowds and Logistics

Trekker Numbers: Extremely low—lowest of the year. You may go entire days without seeing another foreign trekker. Perhaps 5% of October's numbers.

Teahouse Operations: Main route teahouses generally stay open (this is their home, they live there year-round), but some remote lodges close. Expect very basic services.

Services: Minimal. Dal bhat and simple Nepali food readily available; Western menus largely unavailable. Bakeries and cafes mostly closed. Limited hot water (solar power doesn't work well in monsoon clouds).

What to Expect: The Reality

The Good:

• Absolute solitude—trails empty, wilderness experience
• Rock-bottom prices (40-50% discounts common)
• Lushest forests of the year, waterfalls at full flow
• Warm temperatures (no winter cold)
• Unique perspective on Himalayan monsoon season
• Deep cultural interactions with locals (no tourist crowds)
• Spiritual, meditative experience if you embrace the conditions
• Flora at peak growth (wildflowers, green vegetation)

The Challenging:

• Heavy rain, often daily on eastern approach
• Mountain views obscured most of the time (clouds, rain, mist)
• Muddy, slippery, challenging trails
• Leeches everywhere in forested sections (serious annoyance)
• Landslide risk on road sections (can delay trek by days)
• Wet gear constantly (nothing dries in humidity)
• Higher altitude sickness risk (barometric pressure changes with storms)
• Thorong La unpredictable (may need to wait for clear window)
• Limited food variety
• Difficult to impossible photography
• Potential flight cancellations (weather delays common in Kathmandu, Pokhara, Jomsom)
• Higher risk overall (weather-related dangers increase)

Best For: Hardcore adventurers comfortable with extreme conditions, extreme budget travelers, botanists/nature enthusiasts interested in monsoon ecology, spiritual seekers wanting solitude, those with very flexible schedules.

Not For: First-time trekkers, anyone prioritizing mountain views, photographers (unless documenting monsoon), those with fixed schedules, trekkers uncomfortable with sustained rain and mud, anyone bothered by leeches.

July-August: Is It Worth It?

Honest Assessment: For most trekkers, no. If your primary goals are mountain views, comfortable trekking, and the classic circuit experience, wait for autumn or spring. You'll be much happier.

However: If you're genuinely interested in experiencing the Himalaya during monsoon, have a tight budget, crave solitude, or are flexible and adventurous, July-August can offer a rewarding—if challenging—experience. Just understand you're signing up for rain, mud, leeches, obscured views, and unpredictable conditions.

The Circuit vs. Other Monsoon Options: During monsoon, consider rain-shadow treks instead: Upper Mustang, Dolpo, or even the western side of the circuit only (Jomsom to Muktinath via Kagbeni). These areas receive far less rain and offer better monsoon trekking experiences.

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September: Monsoon Transition

Overall Rating: 6.5/10 | Thorong La Difficulty: 6/10 (Improving Through Month)

September marks the monsoon's gradual retreat and the transition toward autumn. Early September still feels monsoon-like; late September approaches autumn conditions. This is a transitional month with improving weather but lingering wet-season challenges.

Temperature Data

| Location | Early Sept High/Low | Late Sept High/Low | |----------|---------------------|---------------------| | Besisahar (800m) | 28°C/18°C (82°F/64°F) | 26°C/16°C (79°F/61°F) | | Manang (3,540m) | 16°C/6°C (61°F/43°F) | 14°C/4°C (57°F/39°F) | | Thorong Phedi/High Camp | 10°C/0°C (50°F/32°F) | 8°C/-2°C (46°F/28°F) | | Thorong La Pass (5,416m) | 2°C/-4°C (36°F/25°F) | 0°C/-6°C (32°F/21°F) | | Muktinath (3,800m) | 16°C/4°C (61°F/39°F) | 14°C/2°C (57°F/36°F) |

Temperature Trend: Gradually cooling through the month as autumn approaches.

Weather Conditions

Precipitation: High early month, decreasing significantly late month.

• Early September (Sept 1-15): Monsoon patterns continue, regular afternoon rain expected
• Late September (Sept 16-30): Monsoon weakening, clearer days increasing, though still variable
• Regional difference: Eastern approach still wetter than western side (rain shadow effect)

Visibility: Improving dramatically through the month. Early September has cloudy/obscured views; late September offers increasing clarity as post-monsoon air clears.

Trail Conditions:

• Early September: Still muddy from monsoon, wet sections common, leeches present (though decreasing)
• Late September: Drying out, conditions improving rapidly, fewer leeches
• Thorong La: Variable early month; improving late month with more stable conditions

Pass Conditions: Improving through month. Early September requires flexibility (weather windows less reliable); late September approaches autumn stability.

Crowds and Logistics

Trekker Numbers:

• Early September: Very low (monsoon hangover)
• Late September: Moderate and increasing (autumn season beginning)
• Trend: Numbers build through month as trekkers anticipate October

Teahouse Operations: All teahouses open and preparing for autumn rush. Services improving after monsoon's end.

Services: Expanding menus and improved services as teahouses gear up for peak season.

What to Expect: The Reality

The Good:

• Improving weather through month (especially late September)
• Fewer crowds than October (significantly cheaper than peak season)
• Lush, green landscapes from monsoon growth
• Late September approaches autumn clarity
• Waterfalls and rivers at full flow
• Good prices (20-40% lower than October)
• Forests still green and beautiful
• Wildflowers at higher elevations
• Increasing weather stability

The Challenging:

• Early September still wet (monsoon tail-end)
• Variable weather (unpredictable transitions between monsoon and autumn)
• Muddy trails, especially early month
• Leeches still present (though decreasing)
• Clouds and obscured views (early September)
• Flight delays possible (weather still unstable)
• Some residual monsoon rain

Best For: Flexible trekkers seeking good value, those who don't mind some residual monsoon conditions, trekkers targeting late September for autumn warmth without October crowds, adventurous souls comfortable with variable weather.

Not For: Risk-averse trekkers (weather unpredictability), those with tight schedules, photographers needing guaranteed clear views (early September), trekkers bothered by lingering mud/wet conditions.

September Strategy: Early vs. Late Month

Early September (Sept 1-15):

• Treat as late monsoon (waterproof gear essential)
• Build extra buffer days
• Expect some rainy days
• Lower crowds, better prices
• Be flexible with itinerary

Late September (Sept 16-30):

• Treat as early autumn (similar to October preparation)
• More reliable weather windows
• Increasing crowds (still manageable)
• Better visibility
• Approaching peak season pricing

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October: Peak Autumn Season

Overall Rating: 10/10 | Thorong La Difficulty: 4/10 (Easiest Conditions)

October is widely regarded as THE best month for the Annapurna Circuit—and for good reason. Post-monsoon clarity delivers crystal-clear visibility, stable high-pressure weather systems bring predictable conditions, comfortable temperatures make trekking pleasant at all elevations, and full services ensure smooth logistics. This is when the circuit shows its absolute best.

Temperature Data

| Location | High | Low | Night at High Camp | |----------|------|-----|-------------------| | Besisahar (800m) | 26°C (79°F) | 14°C (57°F) | - | | Manang (3,540m) | 14°C (57°F) | 0°C (32°F) | - | | Thorong Phedi/High Camp | 6°C (43°F) | -8°C (18°F) | -8°C to -12°C | | Thorong La Pass (5,416m) | -4°C (25°F) | -12°C (10°F) | - | | Muktinath (3,800m) | 14°C (57°F) | -2°C (28°F) | - |

Temperature Feel: Pleasant at lower elevations (light layers), comfortable at mid elevations, cold but manageable at high elevations and pass.

Weather Conditions

Precipitation: Very low. October is one of the driest months with minimal rainfall. Occasional light snow possible at very high elevations (above 4,500m) but rare.

Visibility: Excellent to outstanding. Post-monsoon air is crystal-clear with minimal haze. Mountain views are spectacular with sharp clarity. This is the year's best photography month.

Trail Conditions: Excellent throughout all elevations. Dry, well-defined trails, good footing, minimal mud, easy navigation.

Pass Conditions: Optimal. Clear trails, stable weather windows, predictable conditions, manageable temperatures. October offers the circuit's best Thorong La crossing conditions.

Crowds and Logistics

Trekker Numbers: Very high—peak season. October sees the circuit's highest trekker numbers, especially mid-October (Oct 10-25). Expect busy trails, particularly the Manang to Muktinath section. You'll see 100-200+ trekkers daily on popular sections.

Teahouse Operations: Fully operational and often fully booked. Advance booking essential for Manang, Thorong Phedi/High Camp, and Muktinath during peak weeks. Popular teahouses fill up by early afternoon.

Services: Complete services throughout. Full menus, all facilities, bakeries and cafes open, shops well-stocked.

What to Expect: The Reality

The Good:

• Crystal-clear mountain views—best visibility of the year
• Stable, predictable weather (high success rate for completing circuit)
• Comfortable temperatures throughout (except High Camp nights)
• Optimal Thorong La conditions—clearest, safest crossing windows
• All services fully operational
• Dry trails, easy walking conditions
• Perfect photography conditions (sharp clarity, dramatic lighting)
• Long daylight hours
• Reliable weather windows
• Strong trekking community (social atmosphere)
• Well-maintained, clear trails

The Challenging:

• Very crowded—trails can feel congested, especially popular sections
• Peak season pricing (no discounts)
• Teahouses often fully booked (advance booking critical)
• Popular viewpoints and photo spots crowded
• Less wilderness solitude feel
• Dust on lower trails from heavy foot traffic
• Competition for good rooms at teahouses
• "Tourist trail" atmosphere in busy sections
• Higher costs for guides, porters, permits during peak season

Best For: First-time circuit trekkers, those prioritizing reliable weather and safety, photographers seeking clear mountain views, anyone wanting optimal conditions, trekkers who enjoy social trail atmosphere, those with limited flexibility (October is most predictable).

Not For: Solitude-seekers, budget travelers (no off-season savings), trekkers who dislike crowds, anyone bothered by busy teahouses, adventurers seeking wilderness isolation.

October Thorong La Crossing: Optimal Conditions

Start Time: 4:30-5:30 AM from High Camp

Expected Duration: 5-7 hours to Muktinath

Weather: Typically clear mornings with stable conditions. Afternoon cloud build-up possible but usually minimal in October.

Success Rate: Very high (98%+)—October has the highest Thorong La success rate of any month.

Trail Conditions: Well-trafficked (easy to follow), clear markings, many other trekkers (helpful for route-finding and safety).

Critical Tips:

• Despite optimal conditions, START EARLY (by 5:30 AM latest)
• Bring headlamp (starts in darkness)
• Layer properly (starts very cold, warms as you ascend and sun rises)
• Carry emergency supplies (conditions can change, even in October)
• Don't underestimate the pass (it's still 5,416m—respect the altitude)

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November: Late Autumn Excellence

Overall Rating: 9/10 | Thorong La Difficulty: 5/10 (Moderate)

November extends autumn's excellent conditions while offering fewer crowds and cooler temperatures than October. Early November remains peak season; late November transitions toward winter. For many experienced trekkers, November is preferable to October—similar weather with less congestion.

Temperature Data

| Location | Early Nov High/Low | Late Nov High/Low | |----------|-------------------|-------------------| | Besisahar (800m) | 24°C/12°C (75°F/54°F) | 20°C/8°C (68°F/46°F) | | Manang (3,540m) | 12°C/-2°C (54°F/28°F) | 8°C/-6°C (46°F/21°F) | | Thorong Phedi/High Camp | 4°C/-10°C (39°F/14°F) | 0°C/-14°C (32°F/7°F) | | Thorong La Pass (5,416m) | -6°C/-14°C (21°F/7°F) | -10°C/-18°C (14°F/0°F) | | Muktinath (3,800m) | 12°C/-4°C (54°F/25°F) | 8°C/-8°C (46°F/18°F) |

Temperature Trend: Cooling through the month, especially noticeable at high elevations. Late November feels distinctly colder than early November.

Weather Conditions

Precipitation: Very low to low. November remains dry with minimal precipitation. Possible light snow at high elevations late month as winter approaches.

Visibility: Excellent. Crystal-clear conditions continue from October. Slightly cooler, drier air can produce even sharper visibility. Outstanding photography conditions.

Trail Conditions:

• All elevations: Excellent, dry trails
• Late November: Possible ice/snow above 4,000m (especially mornings)
• Thorong La: Clear early month; possible snow accumulation late month (especially after mid-November)

Pass Conditions: Very good to excellent. Early November similar to October (optimal). Late November becomes colder with increasing winter characteristics but still generally passable with proper preparation.

Crowds and Logistics

Trekker Numbers:

• Early November (Nov 1-15): High (peak season continuation)
• Late November (Nov 16-30): Moderate and decreasing (winter approaching)
• Overall: Noticeably fewer than October, especially late month

Teahouse Operations: Fully operational. Booking still recommended early November; less critical late November.

Services: Complete services throughout, though some teahouses begin shutting down facilities late month anticipating winter.

What to Expect: The Reality

The Good:

• Excellent weather continuing from October (early November)
• Crystal-clear visibility throughout
• Fewer crowds than October (20-40% less, especially late month)
• Still-stable Thorong La conditions
• Dry trails, good walking conditions
• Easier to find accommodation (less competition)
• Good value (prices beginning to drop late month)
• Outstanding photography conditions
• Quieter trail atmosphere

The Challenging:

• Cooling temperatures, especially high elevations
• Late November nights at High Camp very cold (-14°C to -18°C)
• Shorter daylight hours (darkness by 5:00-5:30 PM)
• Some teahouses begin closing late month
• Increasing cold requires better gear (warmer sleeping bag, insulated jacket)
• Early signs of winter conditions (ice, possible snow) late month

Best For: Trekkers seeking excellent conditions with fewer crowds, experienced hikers comfortable with cooler temperatures, photographers wanting crystal clarity, those preferring quieter trails while maintaining good weather.

Not For: Cold-sensitive trekkers (especially late November), those without proper cold-weather gear, anyone uncomfortable with winter characteristics, trekkers seeking warmest conditions.

November Month Breakdown

Early November (Nov 1-15):

• Peak season conditions continue
• Still busy (but less than October)
• Excellent weather and visibility
• Full services operational
• Approaching peak season pricing
• Optimal Thorong La conditions
• Comfortable temperatures

Late November (Nov 16-30):

• Transitioning toward winter
• Significantly fewer crowds
• Still good weather (increasingly cold)
• Services beginning to reduce
• Lower prices (20-30% off peak)
• Thorong La getting colder (winter preparation needed)
• Winter gear required (warmer sleeping bag essential)

November Packing Adjustments

Beyond standard trek gear, November requires:

• Sleeping bag: -15°C rated minimum (late November: -20°C rated)
• Insulated jacket: Good down or synthetic jacket for high elevations
• Warm layers: Thermal base layers, fleece mid-layers
• Winter accessories: Warm gloves (not just light gloves), warm hat, neck gaiter/buff
• Headlamp: Earlier sunset requires good lighting (longer evening hours in teahouses)

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December: Early Winter Challenge

Overall Rating: 5.5/10 | Thorong La Difficulty: 8/10 (Very Cold)

December marks the circuit's transition into winter. Conditions become significantly colder, especially at high elevations, while days grow shorter. However, exceptional clarity and empty trails appeal to experienced winter trekkers. This is off-season trekking requiring proper preparation.

Temperature Data

| Location | High | Low | Night at High Camp | |----------|------|-----|-------------------| | Besisahar (800m) | 18°C (64°F) | 6°C (43°F) | - | | Manang (3,540m) | 6°C (43°F) | -8°C (18°F) | - | | Thorong Phedi/High Camp | -2°C (28°F) | -16°C (3°F) | -16°C to -22°C | | Thorong La Pass (5,416m) | -12°C (10°F) | -22°C (-8°F) | - | | Muktinath (3,800m) | 8°C (46°F) | -10°C (14°F) | - |

Wind Chill: Effective temperatures at Thorong La can feel like -30°C or colder with wind.

Weather Conditions

Precipitation: Very low. December is dry with minimal precipitation, though occasional snowfall at high elevations possible.

Visibility: Excellent to outstanding. Winter's cold, dry air produces crystal-clear views rivaling October. Photography conditions are superb for those willing to endure the cold.

Trail Conditions:

• Lower elevations (800-2,500m): Dry, excellent conditions
• Mid elevations (2,500-3,500m): Good conditions, possible frost/ice in mornings
• High elevations (3,500m+): Snow and ice likely, especially above 4,000m
• Thorong La: Snow-covered likely, potentially icy, challenging footing

Pass Conditions: Challenging due to cold and potential snow. Passable most years with proper gear, but some years see significant snow accumulation. The main challenge is extreme cold, not impassability.

Crowds and Logistics

Trekker Numbers: Low to very low. December sees dramatic drop in trekkers—perhaps 10-20% of October numbers. Quiet, empty trails.

Teahouse Operations: Most main-route teahouses remain open, but some higher lodges may close during coldest period (late December). High Camp may have limited operations.

Services: Reduced services, limited menus (basic dal bhat widely available), fewer Western food options, minimal bakery/cafe services.

What to Expect: The Reality

The Good:

• Empty trails, true solitude
• Crystal-clear mountain views with winter clarity
• Dramatic snow-covered high-altitude landscapes
• Low prices (30-50% discounts common)
• Personal attention from teahouse staff
• Spiritual, peaceful trekking experience
• Outstanding photography for cold-hardy photographers
• Dry, stable weather (minimal precipitation)
• Unique perspective on the circuit in winter

The Challenging:

• Extreme cold at high elevations (serious winter gear required)
• Night temperatures at High Camp brutal (-16°C to -22°C)
• Shorter daylight hours (darkness by 5:00 PM)
• Unheated teahouse rooms (heating costs extra 500-1000 NPR/night)
• Limited hot water (solar systems less effective in winter)
• Some teahouses closed (especially remote lodges)
• Possible Thorong La closure after heavy snowfall
• Snow/ice on high-elevation trails
• Difficult acclimatization in cold
• Limited menu options
• Early sunset limits trekking hours

Best For: Experienced winter trekkers, those with proper cold-weather gear, solitude-seekers comfortable with extreme conditions, budget travelers willing to endure cold, photographers wanting dramatic winter landscapes.

Not For: First-time circuit trekkers, cold-sensitive hikers, those without winter camping/trekking experience, anyone lacking proper winter gear, trekkers with tight schedules (pass closure risk).

December Pass Closure Risk

Thorong La can close temporarily in December due to snowfall. Closures typically last 1-3 days until the trail is broken and conditions improve. Heavy snow years may see longer closures.

Mitigation Strategies:

• Build 3-4 buffer days into itinerary
• Carry extra snacks/food (in case of delays)
• Monitor weather forecasts at Manang
• Consult with teahouse staff about upcoming weather
• Be prepared to wait at Manang or Thorong Phedi
• Have backup plans (helicopter evacuation costs $2,000-4,000)

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Thorong La Pass Conditions: Month-by-Month Summary

Thorong La (5,416m) is the circuit's crux. Pass conditions determine circuit success more than any other factor. Here's a month-by-month summary of Thorong La-specific conditions:

| Month | Pass Difficulty | Temperature (Morning) | Conditions | Success Rate | Notes | |-------|----------------|----------------------|------------|--------------|-------| | January | 9/10 (Extreme) | -20°C to -25°C | Very cold, possible deep snow | High (if prepared) | Requires winter expertise | | February | 8/10 (Very Cold) | -18°C to -22°C | Cold, snow likely | High (improving) | Late Feb better than early | | March | 6/10 (Moderate) | -10°C to -15°C early / -6°C to -10°C late | Improving, warming | Very High | Best winter-spring transition | | April | 5/10 (Moderate-Easy) | -6°C to -10°C | Excellent, manageable cold | Very High (95%+) | Peak season optimal | | May | 5/10 (Moderate-Easy) | -3°C to -6°C | Warm, possible afternoon clouds | Very High | Warmest pass crossing | | June | 6/10 (Moderate) | 0°C to -4°C | Variable, possible snow/rain | Moderate | Weather-dependent | | July | 7/10 (Variable) | 2°C to -2°C | Unpredictable, possible storms | Moderate | Monsoon affects | | August | 7/10 (Variable) | 2°C to -2°C | Similar to July | Moderate | End-monsoon improving | | September | 6/10 (Improving) | -2°C to -6°C | Variable early, good late | High (late Sept) | Improving through month | | October | 4/10 (Easiest) | -8°C to -12°C | Optimal, stable, clear | Very High (98%+) | Best conditions of year | | November | 5/10 (Moderate) | -10°C to -14°C early / -14°C to -18°C late | Excellent early, cold late | Very High early / High late | Early Nov optimal | | December | 8/10 (Very Cold) | -16°C to -22°C | Extreme cold, possible snow | High (if prepared) | Winter preparation required |

Thorong La Crossing Success Factors

Beyond weather and season, several factors determine crossing success:

1. Proper Acclimatization

• Spend 2+ nights in Manang (3,540m)
• Consider acclimatization hikes (Gangapurna Lake, Ice Lake, Praken Gompa)
• Don't rush the approach (minimum 7-8 days Besisahar to Manang)

2. Starting Time

• Start between 3:00-5:30 AM depending on season
• Earlier in winter (3:00-4:00 AM), slightly later in warmer months (4:30-5:30 AM)
• Goal: Summit the pass by 8:00-10:00 AM before afternoon weather

3. Physical Fitness

• The pass is long (5-8 hours from High Camp) and high (5,416m)
• Cardiovascular fitness critical
• Train with weighted backpack hiking if possible

4. Proper Gear

• Warm layers (temperature drops as you gain altitude in early morning)
• Good boots with traction
• Trekking poles (helpful for balance and knee strain on descent)
• Headlamp (starts in darkness)
• Emergency supplies (snacks, water, first aid)

5. Weather Window

• Check forecast at Manang
• Consult teahouse staff about upcoming weather
• Be willing to wait an extra day for good conditions
• Don't attempt in whiteout or severe weather

6. Flexibility

• Build buffer days (2-3 minimum)
• Be prepared to turn back if conditions deteriorate
• Have evacuation plan (helicopter costs $2,000-4,000)

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Monsoon Impact: Understanding the Eastern Approach

The Annapurna Circuit's geography creates dramatically different monsoon experiences on its eastern and western sides. Understanding this is critical for monsoon-season planning (or avoiding it).

Eastern Approach (Besisahar to Manang via Marshyangdi Valley)

Monsoon Impact: SEVERE

The Marshyangdi valley approach sits fully exposed to monsoon weather systems arriving from the south. During June-August:

Below 2,000m (Besisahar, Ngadi, Bahundanda, Jagat):

• Heavy afternoon/evening rain almost daily
• Occasional all-day rain during intense monsoon systems
• Very muddy, slippery trails
• Leeches abundant in forested sections (peak leech season)
• Obscured mountain views
• High humidity
• Swollen rivers, dramatic waterfalls

2,000-3,000m (Dharapani, Chame):

• Regular rainfall, though slightly less intense than lower elevations
• Muddy trails, especially forested sections
• Leeches present
• Clouds obscuring peaks
• Wet conditions persistent

3,000-3,500m (Pisang, Manang):

• Moderate rainfall (less than lower elevations)
• Better drainage (rockier terrain)
• Fewer leeches
• Cloudy most days, limited mountain views
• Drier than eastern valleys but still monsoon-affected

Western Side (Muktinath to Jomsom via Kali Gandaki Valley)

Monsoon Impact: MODERATE TO LOW (Rain Shadow Effect)

The Annapurna and Dhaulagiri massifs block monsoon clouds, creating significantly drier conditions on the western side:

Muktinath/Jomsom/Kagbeni:

• Much drier than eastern approach
• Occasional light rain (far less than Marshyangdi)
• Generally clear conditions
• Better mountain visibility
• Trails remain relatively dry
• Minimal mud
• No leeches

Practical Impact: During monsoon, some trekkers consider doing the circuit in reverse (starting from Jomsom, crossing Thorong La, descending Marshyangdi) to experience the drier western side first. However, this creates higher altitude gain per day and harder acclimatization. The standard direction (Besisahar to Jomsom) remains recommended even during monsoon for acclimatization reasons.

Monsoon Alternative: Western Side Only

For June-August trekkers, consider skipping the full circuit and trekking only the western rain-shadow side:

Option: Fly Pokhara → Jomsom, trek to Muktinath, explore Kagbeni/Upper Mustang entrance, return to Jomsom, fly out.

Benefits:

• Dramatically less rain
• Better visibility
• Drier trails
• No leeches
• Shorter trek (5-7 days)
• Still culturally rich (Tibetan Buddhist culture)

Drawback: You miss the full circuit experience and Thorong La crossing.

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Winter Feasibility: December-February Analysis

Winter trekking the Annapurna Circuit (December-February) is possible but demanding. Here's an honest assessment:

Can You Trek the Circuit in Winter? Yes, But...

The circuit remains passable through winter with proper preparation, gear, and expectations. Teahouses stay open (though some remote lodges close), trails are navigable (though snow/ice requires caution), and Thorong La typically remains crossable (though very cold).

Winter Success Requirements

1. Proper Winter Gear (Non-Negotiable)

• -20°C to -25°C rated sleeping bag
• Insulated down jacket (-20°C rated)
• Winter gloves (liner + insulated outer)
• Warm hat, balaclava, face protection
• Insulated pants (for high camp/pass)
• Winter boots with insulation
• Microspikes or crampons
• Hand/toe warmers (chemical warmers for pass day)

2. Cold Tolerance

• Night temperatures at High Camp: -16°C to -25°C
• Unheated rooms (heating costs extra)
• Limited hot water
• Early darkness (5:00 PM sunset)

3. Flexibility

• Pass may close temporarily after snowfall
• Need 3-4 buffer days minimum
• Be prepared to wait for clear weather

4. Experience

• Winter trekking experience recommended
• High-altitude experience helpful
• Self-sufficiency important (fewer trekkers means less help available)

5. Budget Flexibility

• Heating costs extra (500-1000 NPR/room/night)
• May need emergency evacuation plan ($2,000-4,000 helicopter)
• Extra food/supplies for potential delays

Winter Benefits

Why Trek in Winter?

• Solitude: Empty trails, peaceful experience
• Clarity: Crystal-clear mountain views rivaling October
• Cost: 30-50% lower prices
• Snow landscapes: Dramatic high-altitude scenery
• Personal service: Intimate interactions with teahouse staff
• Challenge: Satisfaction of completing winter circuit
• Photography: Unique winter landscapes and lighting

Winter Challenges

What Makes Winter Hard?

• Extreme cold at high elevations
• Short days (darkness by 5:00 PM limits trekking hours)
• Limited services (reduced menus, fewer facilities)
• Unheated rooms (cold sleeping conditions)
• Pass closure risk (after heavy snowfall)
• Difficult acclimatization (cold hampers adjustment)
• Limited hot water (solar systems less effective)
• Higher calorie needs (body burns more calories staying warm)
• Ice/snow on trails (requires careful footing)

Winter Verdict

Should You Trek in Winter?

Yes, if:

• You have winter trekking experience
• You own or can rent proper winter gear
• You're comfortable with extreme cold
• You have schedule flexibility (buffer days for delays)
• You value solitude over comfort
• You're budget-conscious and willing to endure hardship for savings

No, if:

• This is your first Himalayan trek
• You don't have proper winter gear
• You're cold-sensitive
• You have a tight schedule
• You prioritize comfort over adventure
• You lack high-altitude experience

Alternative: If interested in winter trekking but concerned about circuit challenges, consider shorter winter treks: Poon Hill, Mardi Himal, or Langtang Valley—all offer winter feasibility with less extreme conditions than circuit winter.

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Shoulder Seasons: September and May Deep Dive

Shoulder seasons (September and May) offer interesting trade-offs: lower crowds and better prices balanced against less-than-ideal weather. Here's detailed analysis:

September: Post-Monsoon Transition

The Case For September:

• Fewer crowds (40-60% less than October)
• Lower prices (20-40% below peak season)
• Lush, green landscapes from monsoon growth
• Late September approaches autumn stability
• Waterfalls at full flow
• Improving weather through month

The Case Against September:

• Early September still wet (monsoon tail)
• Variable weather (unpredictable transitions)
• Lingering mud and leeches
• Obscured views (especially early month)
• Flight delays possible
• Clouds common

Verdict: Late September (Sept 20-30) is worth considering. Early September (Sept 1-15) only for adventurous budget trekkers.

May: Pre-Monsoon Warmth

The Case For May:

• Warmest temperatures (comfortable high camp)
• Good Thorong La conditions (temperature-wise)
• All services fully operational
• Rhododendrons blooming at high elevations
• Long daylight hours
• Stable enough weather (especially early May)

The Case Against May:

• Increasing afternoon clouds (mountain views limited)
• Pre-monsoon haze (reduced photography quality)
• Hot conditions at low elevations (uncomfortable below 2,000m)
• Afternoon rain showers (late May)
• Less crystal clarity than autumn/spring
• Dusty trails

Verdict: Early May (May 1-15) is reasonable. Late May (May 16-31) better avoided—wait for autumn instead.

Shoulder Season Strategy

If Trekking Shoulder Seasons:

September:

• Target late September (Sept 20-30)
• Bring waterproof gear (monsoon hangover possible)
• Build extra buffer days
• Start early each day for best visibility
• Be flexible with itinerary

May:

• Target early May (May 1-15)
• Start hiking VERY early (6:00-6:30 AM) before afternoon clouds
• Expect hot conditions at low elevations (light clothing)
• Carry rain gear for increasing pre-monsoon showers
• Best mountain views before 10:00 AM

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Crowd Levels by Month: What to Expect

Understanding crowd levels helps set expectations and plan logistics:

Crowd Level Rankings (1 = Empty, 10 = Very Crowded)

| Month | Crowd Level | Description | Booking Necessity | |-------|-------------|-------------|-------------------| | January | 2/10 | Very quiet, isolated trekkers only | Not needed | | February | 2/10 early, 3/10 late | Quiet, increasing late month | Not needed | | March | 5/10 early, 7/10 late | Building crowds, busy late month | Recommended late March | | April | 9/10 | Peak spring season, very busy | Essential (advance booking) | | May | 8/10 early, 6/10 late | Busy early, decreasing late | Recommended early May | | June | 2/10 | Very quiet, monsoon beginning | Not needed | | July | 1/10 | Quietest month of year | Not needed | | August | 1/10 | Extremely quiet | Not needed | | September | 3/10 early, 6/10 late | Building toward autumn | Recommended late Sept | | October | 10/10 | Peak season, busiest month | Essential (book weeks ahead) | | November | 8/10 early, 5/10 late | Busy early, decreasing late | Recommended early Nov | | December | 3/10 | Quiet, winter beginning | Not needed |

High Season vs. Low Season Experience

High Season (October, April, late March, early November):

• Trails: Busy, social, seeing many trekkers daily (50-200+ in popular sections)
• Teahouses: Often full by afternoon; advance booking critical
• Atmosphere: Social, communal dining, easy to meet other trekkers
• Logistics: Easier (well-trodden path, many people to ask for help)
• Wilderness feel: Less isolated, more tourist trail atmosphere
• Services: Full menus, all facilities operating
• Prices: Peak season rates, no negotiation

Low Season (January-February, June-August, December):

• Trails: Empty, solitude, may go days without seeing others
• Teahouses: Plenty of space, walk-in availability
• Atmosphere: Intimate, quiet, more interaction with locals than tourists
• Logistics: Harder (fewer people, more self-reliance needed)
• Wilderness feel: Strong, isolated, peaceful
• Services: Reduced menus (basic dal bhat always available), limited facilities
• Prices: 30-50% discounts, negotiable rates

Crowd Hotspots: Where Congestion Happens

Even during peak season, crowds concentrate in specific areas:

Busiest Sections:

• Manang (acclimatization stop—everyone spends 1-2 nights)
• Thorong Phedi to High Camp (bottleneck before pass)
• Thorong La summit (everyone crosses around same time)
• Muktinath (post-pass celebration, Hindu pilgrimage site)

Quieter Sections:

• Lower Marshyangdi valley (Besisahar to Chame—long, spread-out)
• Kali Gandaki descent (Muktinath to Jomsom—faster descent, people spread out)
• Upper Marshyangdi (Manang to Thorong Phedi—shorter section, varies by daily stage)

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Weather Patterns: East vs. West Side Differences

The circuit's geography creates distinct weather patterns on eastern and western sides:

Eastern Side: Marshyangdi Valley (Besisahar to Manang)

Characteristics:

• Exposure: Fully exposed to weather systems from south
• Monsoon: Receives heavy monsoon rainfall (June-August)
• Climate: More moderate, wetter year-round
• Vegetation: Lusher forests, more greenery
• Winter: Moderate cold, some snow at high elevations
• Autumn/Spring: Excellent conditions, clear visibility

Monthly Pattern:

• Dry Season (Oct-May): Excellent conditions, minimal rain
• Monsoon (Jun-Aug): Heavy rain below 3,000m, moderate above
• Transition (Sept): Improving from monsoon wetness

Western Side: Kali Gandaki Valley (Muktinath to Jomsom to Tatopani)

Characteristics:

• Exposure: Rain shadow from Annapurna/Dhaulagiri massifs
• Monsoon: Significantly drier, much less rainfall
• Climate: Drier, more extreme temperature swings
• Vegetation: Sparser, more alpine/desert-like
• Winter: More extreme cold, very dry
• Year-round: Generally drier than eastern side

Monthly Pattern:

• Dry Season (Oct-May): Very dry, minimal precipitation
• Monsoon (Jun-Aug): Light rain only, much drier than eastern approach
• Transition (Sept): Already dry, less monsoon impact

Practical Implications

Trekking Direction: The standard direction (Besisahar → Manang → Thorong La → Muktinath → Jomsom) is recommended because:

1. Better acclimatization (gradual altitude gain)
2. Prevailing winds (generally west to east at high altitudes favor this direction)
3. Cultural progression (Hindu lowlands to Buddhist highlands)

Reverse Direction Considerations: Starting from Jomsom (reverse direction) is sometimes considered for monsoon season (drier western side first) but creates acclimatization challenges (faster altitude gain, harder to adjust).

Weather Forecasting: Weather at Besisahar tells you nothing about Manang or Muktinath conditions. Check forecasts for specific locations along the route. Manang weather ≠ Muktinath weather even though they're only one day apart.

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Festival Timing: Cultural Events and Trekking

Major Nepali festivals can impact your circuit experience (dates vary by lunar calendar):

Dashain (September-October)

Nepal's biggest festival, celebrating victory of good over evil. Falls in September or October (varies annually, follows lunar calendar).

Impact on Trekking:

• Positive: Festive atmosphere, cultural experiences, decorations in villages
• Negative: Domestic tourists increase (Nepalis trek during holidays), teahouses busier, flights more crowded
• Logistics: Booking more competitive, prices may not drop even if fewer foreign trekkers

Should You Trek During Dashain?

• Pros: Cultural immersion, festive atmosphere
• Cons: Busier than typical for that season, higher prices, crowded flights
• Verdict: Avoid if seeking solitude; embrace if interested in cultural festival experience

Tihar (October-November)

Festival of Lights, celebrating Lakshmi (goddess of wealth) and the bond between brothers and sisters. Follows shortly after Dashain.

Impact on Trekking:

• Similar to Dashain: festive atmosphere, domestic tourists, busier teahouses
• Timing usually coincides with peak October/November trekking season (compounds crowds)

Tiji Festival (May, Upper Mustang)

Tiji is a three-day Tibetan Buddhist festival celebrated in Lo Manthang (Upper Mustang, accessible from Kagbeni near Muktinath).

Impact:

• Occurs in May (dates vary)
• If you're descending from Thorong La in May during Tiji, you could make a side trip to Upper Mustang to witness this unique cultural event
• Upper Mustang requires special permit ($500 USD for 10 days)

Losar (Tibetan New Year, February)

Tibetan New Year celebrated in Manang, Muktinath, and other Buddhist regions of the circuit.

Impact on Trekking:

• Festive atmosphere in Manang
• Cultural performances, special foods
• Occurs during winter (February)—if you're winter trekking, you might experience this
• Some teahouses may have limited operations during festival days (family celebrations)

Festival Strategy

Check Dates Before Booking: Major festivals follow lunar calendar, so dates change yearly. Research specific year's dates.

Embrace or Avoid: Decide if you want cultural immersion (trek during festivals) or prefer quieter trails (avoid festival periods).

Book Ahead: Festival periods increase demand. If trekking during major festivals, book accommodations and flights further in advance.

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Best Time by Priority: Choosing Your Perfect Month

Different priorities yield different "best" months:

Priority: Best Overall Weather and Conditions

Best Months: October, November (early), April

Why: Stable weather, clear skies, optimal Thorong La conditions, comfortable temperatures, full services.

Choose: October for absolute best; early November for similar conditions with fewer crowds; April for spring rhododendrons and warmth.

Priority: Fewest Crowds and Solitude

Best Months: January, February, July, August

Why: Off-season months with minimal trekkers, empty trails, peaceful experience.

Choose: January-February for winter solitude with clear skies (but extreme cold); July-August for monsoon solitude (but wet conditions and obscured views).

Priority: Lowest Cost and Budget Savings

Best Months: December, January, February, June, July, August

Why: Off-season discounts (30-50% lower), negotiable rates, budget teahouse options.

Choose: December-February for cold-weather savings with clear skies; June-August for monsoon savings (but wet conditions).

Priority: Best Photography

Best Months: October, late March, early November

Why: Crystal-clear visibility, sharp mountain views, stable lighting, dramatic conditions.

Choose: October for post-monsoon clarity; late March for spring light with fewer crowds; early November for autumn clarity with less congestion than October.

Priority: Warmest Temperatures

Best Months: May, June (early)

Why: Warmest conditions year-round, comfortable high camp, minimal cold stress.

Choose: May for pre-monsoon warmth with decent weather; early June if you don't mind early monsoon conditions.

Priority: Best Rhododendron Viewing

Best Months: Late March, April, early May

Why: Rhododendrons bloom at different elevations through spring.

Choose: Late March for beginning blooms at lower elevations; April for peak blooms mid-elevations (2,500-3,500m); early May for high-elevation blooms.

Priority: Safest Thorong La Crossing

Best Months: October, early November, April

Why: Most stable pass weather, predictable conditions, manageable temperatures, high success rates.

Choose: October for optimal pass conditions (98%+ success rate); April for similar stability with warmer temperatures; early November for excellent conditions with fewer crowds.

Priority: Most Reliable for Fixed Schedules

Best Months: October, April

Why: Predictable weather reduces risk of delays, stable conditions minimize pass closure risk, reliable flight schedules.

Choose: October or April if you have non-flexible dates and need maximum reliability.

Priority: Best Balance (Weather + Crowds + Cost)

Best Months: Late March, late September, early November

Why: Near-peak weather with significantly fewer crowds and better prices than pure peak season.

Choose: Late March for spring transition (excellent weather, pre-peak crowds); late September for autumn transition (improving weather, post-monsoon); early November for autumn tail (excellent weather, declining crowds).

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What to Pack by Season: Essential Gear Guide

Packing requirements vary dramatically by season:

Spring/Autumn Packing (March-May, September-November)

Standard Trekking Season Gear:

Clothing:

• Base layers (light to medium weight)
• Trekking pants (2 pairs—one for warmer lower elevations, one for cold high elevations)
• Fleece or synthetic mid-layer
• Insulated jacket (down or synthetic, -10°C rated minimum)
• Waterproof rain jacket (Gore-Tex or equivalent)
• Rain pants (for unexpected showers)
• Warm hat, sun hat
• Gloves (light liner gloves + insulated gloves for pass)
• Buff/neck gaiter
• Trekking socks (4-5 pairs)
• Underwear (moisture-wicking)

Sleeping:

• Sleeping bag: -10°C to -15°C rated (spring/autumn standard)
• Sleeping bag liner (optional, adds warmth)

Footwear:

• Trekking boots (broken in, ankle support, waterproof)
• Camp shoes (lightweight sandals or running shoes for evenings)

Gear:

• Backpack (50-65L if carrying everything; 30-40L if using porter)
• Trekking poles
• Headlamp with extra batteries
• Water bottles or hydration system (3L capacity total)
• Sunglasses (UV protection critical at altitude)
• Sunscreen (SPF 50+)
• First aid kit
• Water purification (tablets or filter)
• Toiletries (toilet paper, hand sanitizer, wet wipes)

Adjustments by Month:

• March: Add warmer sleeping bag (-15°C rated) for early March
• May: Lighter sleeping bag acceptable (-5°C to -10°C), more rain gear for late May
• September: Full rain gear essential early month; standard gear late month
• November: Warmer sleeping bag (-15°C to -20°C) late month

For complete packing list: Nepal Trekking Packing Guide

Winter Packing (December-February)

Critical Winter Additions:

Extreme Cold Gear (Non-Negotiable):

• Sleeping bag: -20°C to -25°C rated (absolutely essential)
• Insulated down jacket: -20°C rated minimum
• Insulated pants (for high camp and pass day)
• Winter gloves (liner + heavy insulated outer gloves)
• Balaclava or face mask (wind protection at pass)
• Warm hat (heavy wool or synthetic)
• Insulated boots (winter-rated with good traction)
• Down booties or warm camp shoes (for cold teahouse evenings)

Winter-Specific Gear:

• Microspikes or crampons (for icy trail sections)
• Hand warmers and toe warmers (chemical warmers for pass day)
• Thermos (for keeping water from freezing)
• Extra batteries (cold drains batteries faster)
• Extra layers (redundancy critical in winter)

Winter Reality:

• Room heating costs extra (bring extra budget for heating: 500-1000 NPR/room/night)
• Limited hot water (solar systems less effective in winter—bring wet wipes)
• Everything costs more in winter (bring extra cash)

Monsoon Packing (June-August)

Waterproof Everything:

Critical Monsoon Gear:

• Quality rain jacket and rain pants (essential, not optional—you'll use them daily)
• Waterproof backpack cover
• Dry bags (multiple sizes for clothes, electronics, sleeping bag, documents)
• Waterproof boots with excellent tread (muddy, slippery trails)
• Leech socks (mandatory for forested sections 2,000-3,000m)
• Quick-dry clothing only (no cotton—it never dries)
• Extra socks (rotate wet/dry pairs daily)
• Sandals with straps (for wet trail sections and river crossings)

Monsoon-Specific Items:

• Insect repellent with DEET (leeches, mosquitoes)
• Salt or tobacco (for removing attached leeches)
• Plastic bags (keeping gear dry)
• Extra headlamp batteries (fewer sunny days to charge solar batteries)
• Lightweight sleeping bag (warm temperatures, but keep it dry!)
• Waterproof phone case

Monsoon Strategy:

• Assume everything will get wet—pack accordingly
• Prioritize quick-drying gear
• Protect electronics religiously (multiple dry bags)

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Booking Timeline by Month: When to Book

Booking timelines vary dramatically by season:

Peak Season Booking (October, April)

Timeline:

6-12 Months Ahead:

• Research and decide on trek dates
• Book international flights to/from Nepal
• Consider booking guided trek if desired (popular agencies fill up early)

3-6 Months Ahead:

• Book domestic flights (Kathmandu-Pokhara if starting/ending there; Jomsom-Pokhara if flying out from Jomsom)
• Reserve teahouse accommodations for critical stops: Manang, Thorong Phedi/High Camp, Muktinath (or arrange through trekking agency)
• Book Kathmandu/Pokhara hotels

1-3 Months Ahead:

• Finalize gear and packing
• Arrange permits (ACAP, TIMS—can be obtained in Kathmandu/Pokhara, but plan ahead)
• Confirm all bookings

Reality: October and April teahouses fill up fast. The most popular lodges in Manang and High Camp can be fully booked weeks in advance. Advance booking is essential for peak season, especially mid-October and mid-April.

Shoulder Season Booking (Late March, May, November, Early September, Late September)

Timeline:

3-6 Months Ahead:

• Book international flights
• Consider trekking agency if desired (less critical than peak season)

1-3 Months Ahead:

• Book domestic flights (Jomsom flights fill up even in shoulder season)
• Optional: Reserve key accommodations (Manang, High Camp) for peace of mind, but walk-in availability usually exists

1 Month Ahead:

• Finalize gear
• Arrange permits

Reality: Shoulder seasons offer more flexibility. Advance booking recommended but not critical. You can often find teahouse space by walking in, though popular lodges may still fill.

Off-Season Booking (January-February, June-August, December)

Timeline:

2-3 Months Ahead:

• Book international flights (prices, not availability, drive early booking)
• Optional: Consider guided trek if solo trekking in winter concerns you

1-2 Months Ahead:

• Book domestic flights (still recommended despite low season—flight schedules are limited)

Anytime:

• Teahouse booking unnecessary (walk-in availability abundant)
• Permits can be arranged upon arrival in Kathmandu/Pokhara

Reality: Off-season offers maximum flexibility. Teahouses are rarely full. You can decide day-by-day where to stay. However, domestic flights still require booking (limited schedules, weather delays common in monsoon/winter).

General Booking Advice

Book in Advance:

• International flights (prices and availability)
• Domestic flights (especially Jomsom flights—limited capacity and weather-dependent)
• Trekking agencies (if using guided trek—popular agencies fill early)

Can Be Flexible:

• Teahouse accommodations (except peak season critical stops)
• Daily itinerary (adapt based on weather, acclimatization, energy)

Arrange Upon Arrival:

• Permits (ACAP, TIMS—easily obtained in Kathmandu/Pokhara)
• Final gear purchases/rentals (Kathmandu/Pokhara have excellent gear shops)
• Porter/guide hiring (if not pre-arranged, can hire locally)

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Annapurna Circuit vs. Annapurna Base Camp: Timing Differences

The Annapurna Circuit and Annapurna Base Camp (ABC) are different treks with different timing considerations:

Key Timing Differences

| Factor | Annapurna Circuit | Annapurna Base Camp | |--------|------------------|-------------------| | Altitude | 5,416m (Thorong La) | 4,130m (ABC) | | Winter Feasibility | Challenging (extreme cold, pass closure risk) | Better (lower altitude, more moderate) | | Monsoon Impact | Severe on eastern approach, moderate western | Severe throughout (no rain shadow) | | Best Months | Oct-Nov, late Mar-Apr | Oct-Nov, Mar-Apr (similar but ABC more forgiving) | | Worst Months | Jun-Aug (monsoon), Jan-Feb (extreme cold) | Jun-Aug (monsoon), Dec-Feb (cold but doable) | | Shoulder Seasons | Sept, May (doable with caveats) | Sept, May (more forgiving than circuit) | | Year-Round? | Possible but challenging off-season | More accessible year-round |

When to Choose Circuit vs. ABC Based on Timing

If Trekking October-November or March-April:

• Either trek is excellent—choose based on duration and difficulty preferences
• Circuit offers more dramatic diversity
• ABC is shorter (7-10 days vs. 12-21 days for circuit)

If Trekking December-February (Winter):

• ABC is more feasible (lower altitude, less extreme cold)
• Circuit requires serious winter preparation
• Recommend ABC for first-time winter trekkers

If Trekking June-August (Monsoon):

• Neither is ideal, but ABC is shorter (suffer less time in rain)
• Circuit's eastern approach is particularly wet
• Consider rain-shadow alternative treks instead: Upper Mustang, Dolpo

If Trekking September or May (Shoulder Season):

• Both are reasonable; ABC slightly more forgiving
• Circuit offers better value (longer trek for shoulder season prices)

Detailed Timing Comparison

For detailed ABC timing: Best Time for Annapurna Base Camp Trek

For Everest region timing: Best Time to Trek Everest Region

For overall Nepal timing: Best Time to Trek Nepal

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Frequently Asked Questions (FAQs)

General Timing Questions

1. What is the absolute best month to trek the Annapurna Circuit?

October is considered the single best month, offering post-monsoon clarity, stable weather, excellent Thorong La conditions, comfortable temperatures, and full services. However, it's also the most crowded and expensive. For similar conditions with fewer crowds, consider late March or early November.

2. Can you trek the Annapurna Circuit in winter?

Yes, the circuit is possible in winter (December-February), but it requires proper winter gear (especially -20°C to -25°C sleeping bag), cold tolerance, flexibility (pass may close temporarily), and experience. It's rewarding for experienced winter trekkers seeking solitude and dramatic snow landscapes but not recommended for first-timers.

3. Is the circuit doable during monsoon season?

Technically yes, but monsoon (June-August) brings heavy rain on the eastern approach, obscured mountain views, muddy trails, leeches, and higher risks (landslides, swollen rivers). Only recommended for adventurous, budget-conscious trekkers who don't prioritize mountain views. Late September (monsoon's tail) is far more reasonable.

4. When is the Annapurna Circuit least crowded?

July and August are the quietest months (peak monsoon), followed by January-February (deep winter). All four months see very few trekkers but come with significant challenges (monsoon rain/leeches or extreme cold).

5. When is the Annapurna Circuit cheapest?

December-February (winter) and June-August (monsoon) offer the lowest prices with 30-50% discounts on accommodations, guides, and porters. However, you'll endure extreme cold (winter) or heavy rain (monsoon) for those savings.

Weather and Conditions

6. What is the weather like on the Annapurna Circuit in October?

October weather is excellent: dry conditions, crystal-clear visibility, stable weather patterns, minimal precipitation, and comfortable temperatures (except High Camp nights which are cold but manageable at -8°C to -12°C). It's the most reliable weather month.

7. When does monsoon start and end in the Annapurna region?

Monsoon typically begins in early June and ends in mid-to-late September. Peak monsoon (heaviest rain) occurs July-August. Early September still feels monsoon-like; late September (after Sept 20) marks clear transition toward autumn.

8. How cold is Thorong La Pass in different months?

• Winter (Dec-Feb): -16°C to -25°C morning temperatures
• Spring (Mar-May): -10°C to -15°C (March) warming to -3°C to -6°C (May)
• Autumn (Sept-Nov): -2°C to -6°C (September) cooling to -8°C to -12°C (October-November)
• Monsoon (Jun-Aug): 0°C to -4°C but variable with storms

9. Does it snow on the Annapurna Circuit?

Yes, snow is common above 4,000m, especially:

• Winter (Dec-Feb): Significant snow likely above 3,500m, including Thorong La
• Autumn/Spring: Occasional light snow above 4,500m
• Monsoon: Possible snow during storms at Thorong La
• Summer: Rare except during heavy monsoon storms

10. What is the rain shadow effect on the circuit?

The Annapurna and Dhaulagiri massifs block monsoon clouds from the south, creating a "rain shadow" on the western side (Kali Gandaki valley). This means the western side (Muktinath, Jomsom, Kagbeni) receives far less rain than the eastern approach (Marshyangdi valley) during monsoon season.

Thorong La Pass Questions

11. What is the best month to cross Thorong La Pass?

October offers the best Thorong La conditions (stable weather, clear skies, manageable cold, 98%+ success rate), followed closely by April and early November. All three months provide predictable weather windows and safe crossing conditions.

12. When does Thorong La close?

Thorong La can close temporarily after heavy snowfall, most commonly:

• Winter (Dec-Feb): Possible closures after storms, typically 1-5 days
• Monsoon (Jun-Aug): Rare but possible snow closures during intense storms
• Other seasons: Closures rare but not impossible

The pass rarely closes for extended periods (weeks). Most closures are brief (1-3 days) until trails are broken.

13. What time should you start crossing Thorong La?

Start time varies by season:

• Winter (Dec-Feb): 3:00-4:00 AM (very cold, need daylight for full descent)
• Spring/Autumn (Mar-May, Sept-Nov): 4:00-5:30 AM (standard timing)
• Summer (Jun-Aug): 4:00-5:00 AM (earlier to avoid afternoon weather)

Goal: Summit the pass by 8:00-10:00 AM before afternoon weather changes.

14. How difficult is Thorong La in different seasons?

• Easiest: October, April (stable weather, manageable cold, clear trails)
• Moderate: March, May, November, September (variable conditions)
• Challenging: December-February (extreme cold), June-August (weather unpredictability)

15. Can you cross Thorong La without a guide?

Yes, the circuit can be done independently without a guide. However, Thorong La is high-altitude (5,416m) and serious. Consider hiring a guide if:

• This is your first high-altitude trek
• You're trekking in winter or monsoon
• You're uncomfortable with navigation
• You want local knowledge for weather/conditions

Acclimatization and Health

16. Does timing affect acclimatization?

Yes, indirectly:

• Cold seasons (winter): Cold hampers acclimatization—body diverts energy to staying warm
• Warm seasons (May-June): Warmer temperatures make acclimatization easier physiologically
• Monsoon: Barometric pressure changes during storms can increase altitude sickness symptoms

Regardless of season, proper acclimatization schedule matters more than timing. Spend 2+ nights in Manang.

17. Is altitude sickness worse in certain months?

Not directly, but cold (winter) and weather changes (monsoon storms) can exacerbate symptoms. The best prevention is gradual ascent, proper hydration, and rest days—not seasonal timing.

18. What if you get sick and need to evacuate? Does season matter?

Yes, season significantly affects evacuation:

• Good weather seasons (Oct, Apr): Helicopter evacuations easier, faster, more reliable
• Bad weather seasons (monsoon, winter storms): Evacuations delayed by weather, helicopters can't fly in clouds/storms, higher risk

Travel insurance with helicopter evacuation coverage is essential year-round but especially critical off-season.

Crowds and Logistics

19. How crowded is the circuit in October vs. April?

Both are peak season, but October is slightly busier than April (October is THE classic autumn trek month in Nepal). However, the difference is marginal—both are very crowded compared to off-season.

20. Do you need to book teahouses in advance?

It depends on season:

• Peak season (October, April): Yes, advance booking essential for Manang, Thorong Phedi/High Camp, Muktinath
• Shoulder season (late March, May, November, late September): Recommended but not critical
• Off-season (winter, monsoon): Not necessary (walk-in availability abundant)

21. Are all teahouses open year-round?

Most teahouses on the main circuit route stay open year-round (they're family homes, not seasonal businesses). However:

• Some remote lodges close in deep winter (late December-January)
• High Camp may have limited operations in winter
• Services reduce in off-season (limited menus, fewer facilities)

22. When should you book domestic flights?

Book domestic flights 1-3 months ahead regardless of season. Jomsom-Pokhara flights have limited capacity and are weather-dependent (delays/cancellations common in monsoon and winter). Even off-season, book flights to ensure seats.

Cost and Budget

23. When is the circuit cheapest?

December-February (winter) and June-August (monsoon) offer 30-50% lower prices on:

• Teahouse accommodations
• Guide/porter fees
• Food (more negotiable rates)

However, savings come with extreme cold (winter) or heavy rain (monsoon).

24. How much can you save by trekking off-season?

Estimated savings:

• Accommodation: 30-50% (negotiable rates, budget rooms available)
• Guides/porters: 20-40% (off-season rates, easier to negotiate)
• Food: 10-20% (less consistent, but negotiable)
• Overall: A circuit that costs $800-1,200 in October might cost $500-800 in January

25. Are October/April prices significantly higher?

Yes, peak season (October, April) brings:

• Non-negotiable standard rates
• Premium charges at popular teahouses
• Higher guide/porter fees (peak demand)
• Overall 20-40% more expensive than shoulder/off-seasons

Special Situations

26. When should solo female trekkers trek the circuit?

Best: October or April (peak season) offers safety in numbers (many other trekkers on trail) and full services. Solo female trekkers report feeling very safe during peak season.

Acceptable: Shoulder seasons (March, May, November, late September) still have reasonable trekker numbers.

Challenging: Off-season (winter, monsoon) means very few other trekkers, requiring more self-reliance. Solo females can still trek off-season but should consider hiring a guide for safety and companionship.

For detailed guide: Solo Female Trekking in Nepal

27. Best time for circuit with children/family?

Best: October or April (stable weather, comfortable temperatures, full services, many other families on trail, safest Thorong La conditions).

Acceptable: Late March or early November (similar conditions, slightly quieter).

Not Recommended: Winter (too cold for children at high camp), monsoon (too wet/muddy, higher risks), shoulder seasons (variable conditions).

28. When should older trekkers (60+) trek the circuit?

Best: October or April (most predictable weather, safest conditions, full medical services if needed, many other trekkers for support).

Older trekkers should prioritize reliability over cost savings—off-season variability increases risks.

29. Best time for photographers?

Best: October (crystal-clear post-monsoon visibility, sharp mountain views, stable lighting)

Also Excellent: Late March, early November (similar clarity with fewer crowds blocking photo spots)

Avoid: May (haze), June-August (clouds, rain), early September (lingering monsoon clouds)

30. Can you see rhododendrons on the circuit? When?

Yes, though the circuit has fewer rhododendrons than ABC trek. Best viewing:

• Late March-April: Lower elevations (2,000-2,500m) near Dharapani, Chame
• April-early May: Mid elevations (2,500-3,500m) scattered groves

The circuit focuses more on alpine desert (high) and subtropical forests (low) than rhododendron forests.

Comparing to Other Treks

31. Is circuit timing different from Everest Base Camp timing?

Somewhat. Both share October-November and March-May as peak seasons, but:

• EBC winter: Slightly easier than circuit winter (less extreme high-elevation cold, no pass crossing)
• Circuit monsoon: Harder than EBC monsoon (circuit's eastern approach very wet; EBC sits in rain shadow)
• Best overlap: October-November (both excellent)

For EBC timing: Everest Base Camp 14-Day Itinerary

32. How does circuit timing compare to Manaslu Circuit?

Very similar timing:

• Best months: October-November, March-April (both)
• Winter: Both challenging (high passes, extreme cold)
• Monsoon: Both difficult (heavy rain on approaches)

Manaslu Circuit is often called "Annapurna Circuit's quieter cousin"—similar timing, similar challenges, fewer crowds.

For Manaslu: Manaslu Circuit

33. Should I trek the circuit or ABC? Which has better timing flexibility?

ABC has better year-round flexibility:

• Lower altitude (4,130m vs. 5,416m) = warmer temperatures, easier winter
• Shorter duration (7-10 days vs. 12-21 days) = less time exposed to bad weather
• No high pass crossing = less closure risk

Circuit offers more diversity:

• Four climate zones, dramatic scenery variety
• Cultural richness (Hindu lowlands to Buddhist highlands)
• Iconic Thorong La crossing

Timing verdict: If trekking off-season (winter/monsoon), ABC is more forgiving. If trekking peak season (Oct/Apr), circuit offers more dramatic experience.

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Final Recommendations: Choosing Your Perfect Timing

After analyzing all twelve months, here are final recommendations:

For First-Time Circuit Trekkers

Best Choice: October or April

Why: Reliability. Your first circuit should be memorable for the right reasons—spectacular views, comfortable conditions, successful Thorong La crossing—not for struggling with extreme cold or monsoon rain.

Alternative: Late March (if you prefer slightly fewer crowds while maintaining excellent conditions)

For Experienced Trekkers Seeking Value

Best Choice: Late March or Early November

Why: Near-peak weather with 30-40% fewer crowds and better prices. You get 90% of October's conditions with more solitude and lower costs.

Alternative: Late September (if you're comfortable with some residual monsoon variability)

For Budget Travelers

Best Choice: December or Early February

Why: Winter offers 30-50% savings with clear skies and visibility. If you have proper gear and cold tolerance, winter delivers dramatic landscapes and empty trails at budget prices.

Alternative: Late February (warming temperatures with off-season prices)

Avoid: Monsoon (June-August) is cheaper but comes with obscured views, mud, and leeches—you save money but compromise the experience significantly.

For Photographers

Best Choice: October

Why: Post-monsoon clarity is unmatched. Crystal-clear visibility, stable lighting, sharp mountain views, and dramatic landscapes make October the photographer's month.

Alternative: Late March or early November (similar clarity with fewer crowds blocking shots)

For Solitude Seekers

Best Choice: January-February (if you can handle extreme cold) or Late September (if you prefer milder conditions)

Why: True wilderness solitude requires off-season. January-February offers empty trails with clear skies but demands winter preparation. Late September provides improving weather with minimal crowds as monsoon ends.

Avoid: October (busiest month), April (second busiest)

For Those With Fixed Schedules (Non-Flexible Dates)

Best Choice: October or April

Why: These months offer the most predictable weather and lowest risk of disruptions (pass closures, flight delays, storms). If you can't afford delays, choose the most reliable months.

Final Timing Wisdom

The circuit is a serious undertaking. Thorong La at 5,416m demands respect. Timing matters—not just for comfort but for safety.

If you have flexibility, use it. The difference between October and July, or between late March and early May, is the difference between a spectacular experience and a challenging suffer-fest.

Match timing to your priorities:

• Prioritize weather/safety: October, April
• Prioritize fewer crowds: Late March, early November, late September
• Prioritize budget: December-February, June-August
• Prioritize reliability: October, April

When in doubt, choose October or late March. These months offer the best balance for most trekkers.

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Conclusion: Your Circuit, Your Timing

The Annapurna Circuit is one of the world's great treks—a journey through cultures, climates, and landscapes that few places can match. But its greatness depends heavily on timing. Choose well, and you'll experience the circuit at its finest: crystal-clear peaks, comfortable conditions, successful Thorong La crossing, and memories that last a lifetime.

Choose poorly, and you'll struggle through monsoon rain, extreme cold, obscured views, or dangerous pass conditions.

This guide has given you the data. Now the decision is yours. Consider your priorities, assess your tolerances, and choose the timing that matches your ideal circuit experience.

Whether you trek in October's perfect clarity, late March's peaceful spring warmth, or January's dramatic winter solitude, the circuit awaits. Time it right, prepare properly, and this ancient trade route will deliver one of trekking's most rewarding adventures.

The mountains are calling. Choose your month, and answer the call.

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Have questions about Annapurna Circuit timing? Want to share your circuit experience from a specific month? Connect with the trekking community and plan your perfect timing for this iconic Himalayan adventure.