You’ve dreamed of trekking the Annapurna Circuit, snow-capped peaks, vibrant villages, and winding trails through the heart of the Himalayas. But one question keeps coming up: When is the best time to go?
The weather on the Annapurna Circuit can make or break your trek. Harsh snow, heavy rains, or even landslides can turn a once-in-a-lifetime trip into a difficult or dangerous challenge. Choosing the right season not only ensures safer conditions but also enhances your experience with clearer views, open teahouses, and manageable trail traffic.
This weather guide breaks down what to expect in each season — spring, monsoon, autumn, and winter, so you can plan your trek with confidence. Whether you’re chasing blooming rhododendrons or crisp mountain skies, understanding the seasonal weather patterns is key to making the most of your journey.
Why Weather Matters on the Annapurna Circuit
How Weather Impacts the Trekking Experience
The weather is one of the most critical factors influencing the Annapurna Circuit Trek. The route covers 160–230 kilometers and climbs from subtropical valleys at 800 meters to Thorong La Pass at 5,416 meters, exposing trekkers to every type of climate.
Expect sudden temperature swings. You might start a day in a warm valley and end it in freezing alpine conditions. Poor weather can block mountain views or even make the trails unsafe.
- Snow can close high passes.
- Rain makes trails slippery and increases landslide risk.
- Cold temperatures worsen the effects of altitude sickness.
In short, understanding the weather helps you stay safe, enjoy better views, and plan rest days and gear needs more effectively.
How Elevation Affects Weather
The Annapurna Circuit isn’t just long, it’s vertical.
- Low altitudes (800–2,000m): Warm and humid, with lush forests and farmland.
- Mid-altitudes (2,000–3,500m): Cooler temperatures, cold nights, occasional snow.
- High altitudes (4,000m+): Harsh alpine climate, subzero nights, strong winds, frequent snow.
This variation means you need to pack for every climate zone, from rain gear for valleys to insulated layers for high passes.
Best Season to Trek the Annapurna Circuit
Choosing the right season is one of the most important decisions you’ll make before starting the Annapurna Circuit. The trail passes through a wide range of altitudes, from warm valleys at 800 meters to the icy heights of Thorong La Pass at 5,416 meters. Because of this, the weather changes dramatically with the seasons. Some months offer perfect blue skies and dry trails, while others bring heavy rain, snow, or extreme cold.
Knowing the best season ensures you’ll have safer conditions, better views, and a more enjoyable experience on the trek. Let’s break down what each season has to offer and which one might be right for you.
When Is the Best Time?
The best months are spring (March–May) and autumn (late September–November).
- Spring: Warmer days, rhododendrons in bloom, long daylight hours, and accessible passes.
- Autumn: Post-monsoon skies, crystal-clear mountain views, dry trails, and perfect temperatures.
If your goal is comfort, safety, and photography, October and April are often considered the sweet spots.
Pros and Cons of Each Season
Each season on the Annapurna Circuit offers a completely different trekking experience. Spring (March to May) is one of the most colorful times of year. The trails are filled with blooming rhododendrons, temperatures are mild, and days are longer. However, by April the crowds increase, and late May can bring pre-monsoon rain showers.
Autumn (September to November) is the most popular season for good reason. The weather is clear and stable, making it the best time for mountain views and photography. Trails are dry and conditions are reliable, but the popularity of this season also means it’s the busiest. Teahouses in popular villages often fill up quickly, so booking ahead is wise.
Winter (December to February) transforms the Annapurna Circuit into a quiet, snow-covered wonderland. Trails are peaceful, and accommodation prices are often lower. But the cold is extreme, especially above 4,000 meters, and Thorong La Pass is frequently closed due to heavy snow. This season is best suited for experienced trekkers with proper gear.
Monsoon (June to August) brings heavy rain to the region. While the lower valleys become lush and green and there are far fewer tourists on the trails, the downsides are significant. Rain makes trails muddy and slippery, leeches are common in forested areas, and landslides can block sections of the route. Visibility is also poor, with mountains often hidden behind thick clouds.
Monsoon is only for adventurous hikers willing to accept difficult conditions. If you prefer a trek that’s shorter and more accessible during challenging months, the Langtang Valley Trek can be an excellent alternative.
In short:
- Spring is best for flowers and moderate weather.
- Autumn is ideal for clear skies and reliable trekking conditions.
- Winter suits trekkers who want solitude and can handle extreme cold.
- Monsoon is only for adventurous hikers willing to accept difficult conditions.
Annapurna Circuit Weather by Season
Autumn (Sep–Nov)
The most popular time. Clear skies, dry trails, and perfect views of Annapurna and Dhaulagiri. Mid-altitude temps: 10–20°C. At Thorong La: as low as -10°C at night. Downsides: crowded trails and full teahouses.
Winter (Dec–Feb)
Snow blankets the high passes. Daytime highs above 4,000m rarely rise above freezing; nights can drop to -20°C. Thorong La is often closed. Trails below Manang remain open, but this season is best left to experienced trekkers with alpine gear.
Spring (Mar–May)
Colorful rhododendron forests, improving conditions, and longer days. March can still be snowy up high, but April–May open up the route. Afternoon clouds and occasional rain showers appear later in the season.
Monsoon (Jun–Aug)
Hot, humid, and rainy. Trails become muddy and landslide-prone, with limited mountain views. Risky for most trekkers, though rain-shadow regions like Upper Mustang stay drier.
Preparing for Annapurna Circuit Weather
Essential Gear by Season
- Spring & Autumn: Base layers, warm mid-layers, down jacket, rain gear, 3-season sleeping bag.
- Winter: Heavy down jacket, thermal base layers, insulated boots, 4-season sleeping bag, crampons.
- Monsoon: Quick-dry clothing, rain gear, waterproof pack cover, gaiters, leech protection.
All year: trekking poles, headlamp, water purification, and a first-aid kit.
Altitude medication should only be taken with a doctor’s advice.
Food Tip: On the trek, most meals are simple and hearty — dal bhat, noodle soups, and potatoes. After days of mountain food, many trekkers crave a taste of home. If you’d like to prepare something cozy before your trip (or dream about it after), try these apple biscuits — the kind of comfort food that pairs perfectly with a hot cup of tea.
Monitoring Weather Conditions
Check forecasts daily with apps like Windy or Yr.no, ask locals in towns like Manang, and review updates from the Department of Hydrology and Meteorology Nepal. Always keep buffer days in case of delays.
Conclusion:
The Annapurna Circuit offers a different face each season. For most trekkers, autumn and spring bring the safest weather, clearest skies, and most enjoyable trails. Winter and monsoon, while quieter, come with serious challenges.
Decide based on your priorities: do you want the best views, fewer crowds, or a true off-season adventure? Pack wisely, monitor conditions, and be flexible with your plans.
The mountains are waiting; choose your season well, and your Annapurna adventure will be unforgettable.