Nepal Weather by Month 2026: When to Visit Each Region

Understanding Nepal's Climate Zones

Nepal spans five climate zones over a horizontal distance of just 200km — from subtropical Terai plains at 70m to the arctic Himalayan peaks above 8,000m. This creates dramatic weather variation even within a single trek. Understanding the basics helps you plan the right itinerary for the right season.

Nepal's Four Seasons

Autumn (September–November) ★★★★★ Best overall

After the monsoon clears in September, Nepal enters its golden season. October and November bring crisp, clear skies with Himalayan views rarely blocked by cloud. Rhododendrons are berried; autumn colours appear in Langtang and Mustang in November. Daytime temperatures at teahouse altitude: 10–20°C. Night temperatures at 4,000m+: -5°C to -15°C in November. Peak trekking season — book guides and accommodation early.

Spring (March–May) ★★★★★ Best for rhododendrons

Nepal's second peak season. Rhododendron forests blaze red and pink in March–April below 4,000m. Temperatures warm compared to autumn; views generally excellent. Pre-monsoon haze can reduce Himalayan clarity in May. Everest expedition season — extra activity and buzz on EBC route in April–May. Nights cold but less extreme than autumn: -3°C to -10°C at 4,000m.

Winter (December–February) ★★★ For low-altitude and Mustang

Cold and quiet. High-altitude passes (above 4,500m) can be snow-blocked in January–February. However, this is the best season for Chitwan wildlife safaris, Kathmandu cultural tourism, and low-altitude treks. Upper Mustang is excellent in winter — rain-shadow location and few tourists. Nights at 4,000m can reach -20°C in January. Clear skies are common.

Monsoon (June–August) ★★ Rain-shadow areas only

Nepal's southwest monsoon brings heavy, consistent rain June–September. Standard trekking routes (Annapurna, EBC, Langtang) are wet, muddy, and leech-populated. However, rain-shadow areas north of the Himalayan main range (Upper Mustang, Nar Phu, Dolpo) remain dry and accessible. Lush green landscapes and waterfalls create their own beauty. Low tourist numbers mean great prices and empty trails.

Month-by-Month Guide

January: Cold, clear, quiet. Great for cultural tourism, low-altitude treks, Chitwan. Snow on passes above 4,500m.

February: Slightly warming. Rhododendron lower forests begin to bud. Very quiet on trails.

March: Spring begins. Lower rhododendrons in bloom. Good trekking conditions start. Busy-ish on popular routes.

April: Peak rhododendron (3,000–4,000m). Excellent conditions. Busiest spring month. Everest expedition season starts.

May: Upper forests in bloom. Pre-monsoon haze starting. Still good for high-altitude treks. Views can be hazier than October.

June: Monsoon arrives. Annapurna, EBC, Langtang get very wet. Upper Mustang becomes ideal.

July: Full monsoon. Trails slippery, leeches active. Consider Mustang, Dolpo only. Lowest prices of year.

August: Monsoon continuing. Green and lush. Rato Machindranath festival in Kathmandu.

September: Monsoon retreating by late September. Trails wet early, drying by month end. Prices rising.

October: Best month of the year. Clear skies, moderate temperatures, all routes open. Book everything 2–3 months ahead.

November: Second-best month. Views remain excellent. Cooler, especially at altitude. Upper trails quieter as season winds down.

December: Cold but clear. Some high passes may snow up. Quiet on trails. Great for Chitwan, Kathmandu, Pokhara.

Regional Weather Differences

Annapurna (South-facing): Full monsoon impact June–September. Best: Oct–Nov, Mar–May.

Everest/Khumbu: Similar monsoon pattern. Wind picks up in May (pre-expedition teams time acclimatisation windows carefully). Best: Oct–Nov, Mar–Apr.

Mustang/Nar Phu (Rain shadow): Viable June–August when everywhere else is wet. Best: Apr–Nov.

Langtang: Short monsoon compared to Annapurna. Best: Oct–Nov, Mar–May. Winter treks to Gosaikunda feasible Dec–Feb.

Chitwan/Bardia (Terai): Opposite logic — avoid in June–September (unbearably hot and wet). Best: October–March.

Altitude and Weather: What Changes as You Climb

Nepal's vertical range means the weather at your destination can be dramatically different from Kathmandu when you land. Useful rules of thumb:

• Temperature drops ~6.5°C per 1,000m of altitude gain — if Kathmandu is 22°C, Namche Bazaar (3,440m) will be around 8–12°C, and Lobuche (4,940m) will be near freezing or below
• Wind speeds increase with altitude — the Kali Gandaki valley (Mustang/Annapurna) funnels sustained 40–60km/h afternoon winds almost daily
• Precipitation types change: rain below 3,000m becomes snow above 4,000m in autumn and winter; even in October, overnight snowfall above 4,500m is possible
• Clouds build in the afternoon — summit views and high passes are best in the morning; plan to reach cols and high camps before noon

How to Read Nepal Weather Forecasts

Standard weather services are unreliable for high-altitude Nepal. Resources that actually work:

• mountain-forecast.com: Altitude-specific forecasts for named Himalayan peaks — excellent for pass-crossing days and summit attempts
• meteoblue.com: Point-on-map forecasting, adjustable by altitude; accurate 3–5 days ahead
• Windy.com (ECMWF model): Wind speed and direction at altitude; the go-to for expedition guides monitoring jet stream position
• Your guide: Experienced local guides read sky, cloud formation, and barometric pressure changes to predict same-day weather far more accurately than any app. Listen to them on pass-crossing days.

Packing for Nepal's Weather by Season

Autumn (October–November)

Layer system: moisture-wicking base layer, mid fleece, waterproof shell (light showers still possible), down jacket for evenings above 3,500m. Trekking pants. Gloves and hat for pre-dawn starts. No down suit needed below 5,000m in October; essential above 5,000m and in November.

Spring (March–May)

Similar to autumn but with more afternoon cloud and occasional rain — keep your waterproof shell accessible. March can be surprisingly cold above 4,000m; May is warm at lower elevations (Pokhara can reach 30°C). The higher you go, the colder it stays.

Winter (December–February)

Full cold-weather layering required for any trek above 2,500m. A -20°C rated sleeping bag for anything above base camp altitudes. Hand and toe warmer packets are useful. Low-altitude and cultural itineraries (Chitwan, Kathmandu, Pokhara) are comfortable in a mid-layer fleece.

Monsoon (June–August)

Lightweight and quick-dry everything. Rain poncho or umbrella (local trekkers use bamboo umbrellas — practical and cultural). Accept that you will get wet on Annapurna/EBC routes. Leech socks are worth adding to your kit. For Mustang: sun protection and wind layers (the rain-shadow effect is real).

Frequently Asked Questions

Is October really the best month for Nepal?

October is widely considered the best single month for trekking in Nepal. The monsoon ends in late September, trails are freshly green, skies clear to crystalline visibility, and temperatures are comfortable — warm enough to hike in a T-shirt at lower elevations but cold enough to feel alpine above 4,000m. The only downside: it is the peak tourist month. Trails, guesthouses, and flights book out 2–3 months ahead. November is equally good for views but 20–30% cooler, and accommodation is easier to find.

Can I trek in Nepal during the monsoon?

Yes, with appropriate destination choice. The Annapurna, Everest, and Langtang circuits are genuinely difficult during the monsoon (June–August) — wet, muddy, leech-heavy, and with frequent flight cancellations to Lukla. However, Upper Mustang, Nar Phu Valley, and the Dolpo region are rain-shadowed and excellent during monsoon. If you have limited flexibility on dates, these regions offer a genuinely rewarding alternative.

Does it snow on the EBC trail?

Yes, above 4,000m, light snowfall is possible any month of the year. Significant snow above 5,000m is common October–April. The trail between Lobuche and Gorak Shep is frequently snow-covered in November and December. Major snowfall events can temporarily close high passes (Thorong La, Cho La) — always have buffer days in your itinerary for weather delays above 4,000m.

Last updated 2026. Weather data sourced from DHM Nepal and HRA Himalayan Rescue Association.