Annapurna Base Camp Weather by Month

January

The coldest month of the year on this route — clear between snowfalls, with ABC nights commonly dropping to around −15°C. Trails are quiet, and this is genuinely a month for experienced, well-prepared winter trekkers rather than a first attempt at the route.

February

A little milder than January but still firmly winter at altitude. Pre-spring signs begin lower down — some early rhododendron budding at the lowest elevations — while ABC and the upper Sanctuary stay cold.

March

Spring genuinely begins. Rhododendrons start emerging, skies are generally clear, and morning frost around Deurali and Machhapuchhre Base Camp is common. ABC temperatures run roughly 0°C to 5°C by day, −8°C to −4°C at night. Crowds stay lower than the peak spring months that follow.

April

Peak spring conditions and the strongest rhododendron bloom of the year, spread across multiple elevation bands simultaneously. Weather is generally stable, with mountain visibility that can match or beat October's. This is also one of the year's busiest months. For the complete breakdown, see our Annapurna Base Camp Trek April guide.

May

Spring's transitional close — warmer and more humid than April, with rhododendrons mostly past peak and pre-monsoon cloud building steadily through the month. Early May stays close to April's stable pattern; late May brings real rain risk and the first leech activity in wet lower forest sections. For the full detail, see our Annapurna Base Camp Trek May guide.

June

The genuine start of monsoon. Rainfall increases substantially, trails turn muddy, and cloud regularly limits mountain visibility. Lower elevations get hot and humid; forests turn vividly green. This is a real trade-off month — quiet trails in exchange for consistently wet conditions.

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July

Peak monsoon. Expect frequent, sometimes heavy rain, wet and slippery trail sections, leeches in the forested lower route, and mountain views that are frequently obscured by cloud. Genuinely the most weather-challenging month for this trek.

August

Monsoon continues through most of the month, though rainfall generally begins tapering by the final weeks. Trails stay wet, cloud cover remains common, and visitor numbers stay low throughout.

September

The post-monsoon transition. Early September still carries real monsoon influence; conditions improve steadily through the month, with visibility and trail conditions both trending toward October's more reliable pattern by the final weeks.

October

Widely regarded as the single most reliable month of the year — clear skies, dry trails, and excellent mountain visibility, at the cost of being the busiest month on the route. For the complete breakdown, including why the Sanctuary's bowl-shaped geography still builds afternoon cloud even on good October days, see our Annapurna Base Camp Trek October guide.

November

Excellent visibility, often comparable to or sharper than October's, with noticeably fewer trekkers and colder temperatures, particularly late in the month. For the full detail, including a real late-November teahouse-closure consideration, see our Annapurna Base Camp Trek November guide.

December

Winter's genuine onset — cold nights, rising snow risk at altitude, and the trekking season's natural wind-down. For the complete winter picture across December through February, see our dedicated ABC in winter guide.

What Is the Weather Like at Annapurna Base Camp?

Cold, in every season, though the degree varies considerably. Daytime temperatures at 4,130 m range from roughly 14°C on a warm May afternoon down to well below freezing on a January morning. Nights are consistently the coldest part of any day here, commonly dropping below 0°C even in the warmer spring and autumn months, and well below −10°C in winter. Wind adds a real chill factor beyond the air temperature alone, and weather here can shift faster than it does lower down the route — a clear morning doesn't guarantee a clear afternoon, particularly given the Sanctuary's tendency to build cloud as the day warms. Treat any specific temperature figure as a planning range rather than a guarantee for your exact dates.

Daytime vs. Nighttime Weather

This pattern holds more reliably in some seasons (autumn, spring) than others (monsoon, where rain can arrive at any time of day) — treat it as a general tendency, not a fixed daily schedule.

Rainfall on the ABC Trek

Nepal's main monsoon runs June through September, and roughly 80% of the country's annual rainfall falls in that window. On this specific route, that means the lower, forested sections see the heaviest and most consistent rain, while the upper Sanctuary generally sees somewhat less extreme rainfall, though it's far from dry during peak monsoon. Outside the monsoon months, rain is possible but much less frequent — a real factor by late May and early September specifically, as the pre- and post-monsoon transitions bring occasional showers even in otherwise favorable months.

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Snowfall at Annapurna Base Camp

Most likely from December through February, with real accumulation possible above roughly 3,000 m. Spring carries residual winter snow that melts progressively through March and April, particularly above Deurali — meaning snow risk actually falls as spring progresses, the opposite pattern from autumn heading into winter. Snow is possible outside these core months too, though genuinely uncommon in October and rare in the warmer monsoon months. Snowfall varies meaningfully by year — some winters bring much heavier accumulation than others — so treat any specific month's snow risk as a general tendency rather than a guarantee in either direction.

Cloud, Visibility and Mountain Views

Morning is the reliable window for clear views across nearly every season on this route, and the reason is largely geographic: the Annapurna Sanctuary is a natural bowl, ringed by peaks that trap moisture rising from the south, which means afternoon cloud builds here more readily than it would in a more open or rain-shadowed setting. This holds even during October and November's generally excellent conditions — a clear October morning is a strong bet; a clear October afternoon is not. Clear-weather statistics for any given month describe likelihood, not a guarantee — individual days can still bring cloud regardless of the season's general reputation.

Wind and Wind Chill

Higher elevations are considerably more exposed than the forested lower route, and wind can make the same air temperature feel meaningfully colder, particularly at ABC and Machhapuchhre Base Camp. Mornings and evenings tend to feel the coldest, when temperature and wind exposure compound. A proper layering system — rather than one heavy jacket relied on for everything — handles this better, since you'll want to adjust quickly as conditions shift through the day.

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How Weather Affects Trail Conditions

Dry weather: generally firm, straightforward walking across most of the route.

Rain: muddy sections, slippery stone steps (particularly the Ulleri climb and the Chhomrong descents), reduced visibility, and leeches in the forested lower sections during and after wet periods.

Snow: ice or snow cover on the higher sections, slower walking, and occasionally the need for additional traction depending on current conditions — never assumed necessary, but worth having available in winter or early spring specifically.

Freeze-thaw cycles: icy patches early in the day that turn wet and slippery once the sun warms them, a genuine factor on winter and early-spring mornings above Deurali.

Weather and Trekking Difficulty

Weather doesn't change the trek's underlying distance or elevation gain, but it changes how hard those factors feel. Rain makes stone steps genuinely more hazardous. Heat and humidity in the lower sections can be more physically draining than a cooler day covering the same ground. Cold demands real gear and slows pace at altitude. Snow adds both physical and navigational difficulty on the higher sections. None of this changes the trek's Moderate rating in any official sense — it changes what a given day actually feels like to walk. For the complete difficulty picture, see the difficulty section within our Annapurna Base Camp Trek Guide.

What to Pack for ABC Weather

Warm-weather essentials: breathable trekking clothes, sun protection, water, and a light rain shell regardless of season.

Cold-weather essentials: insulating mid-layers, a genuine down or synthetic jacket, gloves, a warm hat, thermal base layers, and a sleeping bag suited to your specific season — considerably warmer for a winter departure than a May one.

Wet-weather essentials: a proper waterproof jacket, a pack cover or dry bags, quick-drying rather than cotton clothing, and trekking footwear with genuinely good grip.

Snow and winter conditions: gear should adapt to actual current conditions rather than a fixed assumption — confirm specific needs like microspikes with your guide or operator close to departure, since snow risk genuinely varies by year. This is weather-specific gear, not the complete list — see the packing section within our Annapurna Base Camp Trek Guide for the full rundown.

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Weather During a Typical 10-Day ABC Trek

Places Nepal's standard itinerary moves through this elevation range in a specific sequence: warm lower trail (Ulleri, Ghorepani) in the trek's early days, cooling through the mid-route (Chhomrong, Dobhan), and genuinely cold conditions through the final push (Machhapuchhre Base Camp, Annapurna Base Camp) before a faster two-day descent retraces the same ground in reverse. This means a single 10-day trek can move through nearly every weather zone this route offers, regardless of which month you travel — the specific temperatures shift by season, but the elevation-driven pattern (warm start, cold peak, faster warm-up on the way down) holds throughout the year.

Can You Trek ABC During Monsoon?

Yes, with real trade-offs worth understanding rather than glossing over. June through August bring frequent rain, muddy and slippery trail sections, leeches in the forested lower route, and cloud cover that regularly limits mountain views. Trails are genuinely quiet during this period, and the landscape turns vividly green. This isn't a season to expect the postcard version of the trek, but it's a real, viable option for a well-prepared trekker specifically drawn to solitude over certainty.

Can You Trek ABC in Winter?

Yes, and December specifically is more forgiving than the deeper cold of January. Higher elevations get genuinely harsh — nights well below freezing, real snow risk above 3,000 m, and trail conditions that can shift with a passing storm. Proper winter-grade clothing and current, local knowledge of conditions matter considerably more this season than in autumn or spring. For the complete winter picture, see our ABC in winter guide.

Best Months for Annapurna Base Camp Weather

There's no single universal "best" month — the right choice depends on whether you're prioritizing guaranteed clear views, flowers, low crowds, or genuine solitude.

How to Check the Weather Before and During Your Trek

Check forecasts close to your actual departure date rather than trusting one made weeks in advance — mountain forecasts lose reliability the further out they're made. Check again once you're on the trail, particularly in the days leading up to any high-altitude push. Local guides and teahouse staff often have better real-time insight than a generic app, since they're watching the same sky you are, day after day, in that specific location. Treat any forecast as one input rather than a guarantee, especially given the Sanctuary's tendency to build its own local afternoon cloud regardless of the broader regional outlook.

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Weather and Trekking Safety

Pay closer attention to conditions when you encounter: heavy or sustained snowfall, persistent rain, thunderstorms, genuinely poor visibility, icy trail sections, or any weather that's shifting noticeably faster than expected. None of these are common everyday occurrences on this route, but they're worth taking seriously rather than pushing through when they do arise — slow down, communicate with your guide, and let conditions, not the schedule, drive the day's decisions. Weather-related fatigue and cold can also mask or compound altitude symptoms, which is one more reason not to treat mountain weather casually even on an otherwise good-reputation month.

Places Nepal's Practical Approach to Weather

Mountain weather is part of trekking in Nepal, not an exception to plan around once and forget. We build itineraries with the region's general seasonal patterns in mind, keep trekkers informed as conditions develop, and adjust day-to-day decisions — pacing, timing, occasionally route details — based on actual current conditions rather than what the calendar predicted weeks earlier.

Frequently Asked Questions

What is the weather like on the Annapurna Base Camp Trek? It varies dramatically by elevation and season — warm and humid in the lower forest, cold and exposed at Annapurna Base Camp, with autumn (especially October) offering the most reliable overall conditions.

How cold is Annapurna Base Camp? Genuinely cold year-round — nights commonly drop below freezing even in the warmer spring and autumn months, and well below −10°C in winter.

What is the temperature at Annapurna Base Camp? Roughly 14°C by day in May at the warm end, down to around −15°C at night in January at the cold end — see the month-by-month table above for the full range.

Does it snow at Annapurna Base Camp? Yes, most likely December through February, with risk falling through spring as winter snow melts and rising again toward the following winter.

Which month has the best weather for ABC? October is generally considered the most reliable overall; April and November are both strong alternatives depending on whether you prioritize flowers or quieter trails.

Does it rain on the Annapurna Base Camp Trek? Yes, most heavily during the June–September monsoon, with occasional rain possible in the pre- and post-monsoon transition months (late May, early September) as well.

Can you trek ABC during monsoon? Yes, with real trade-offs — frequent rain, muddy trails, and limited mountain views, in exchange for genuine solitude and vividly green landscapes.

Can you trek ABC in winter? Yes, particularly in December — January and February are colder and demand more serious winter preparation.

Is April good for Annapurna Base Camp weather? Yes — stable, warm, with peak rhododendron bloom and visibility comparable to October's.

Is May good for Annapurna Base Camp weather? Yes, particularly early in the month — warmer and generally quieter than April, with rising rain risk by late May.

Is October good for Annapurna Base Camp weather? Yes — widely regarded as the single most reliable month of the year, at the cost of being the busiest.

Is November good for Annapurna Base Camp weather? Yes — excellent visibility, often comparable to or sharper than October's, with noticeably fewer trekkers.

How quickly does weather change on the ABC trek? It can shift within hours, particularly in the Sanctuary itself, where afternoon cloud frequently builds even on an otherwise clear day.

What should I wear for Annapurna Base Camp weather? A genuine layering system — breathable clothing for the warm lower sections, and full cold-weather insulation for Chhomrong upward, adjusted by season.

Final Practical Advice

Annapurna Base Camp doesn't have one weather story — it has at least four, depending on which elevation and which month you're asking about. The single most useful thing to internalize: a warm, sunny morning lower down the trail tells you very little about what you'll find at 4,130 m that same evening. Plan your packing and your expectations around the elevation you're heading toward, not the elevation you're currently standing at, and check conditions close to your actual departure rather than trusting a forecast made weeks out.

Not sure which month's weather fits what you're looking for? See the full 10-day Annapurna Base Camp Trek for current departure dates, or dig into our month-specific guides for the season you're considering.