Guidance
Best Season & Weather
Nepal’s weather varies dramatically by season, region, and altitude - the difference between a good trek and a miserable one often comes down to timing. Here’s exactly what to expect each season, so you can plan around it rather than be surprised by it.
Spring
March – May
Widely considered the best trekking season. Rhododendron forests bloom across lower elevations, temperatures are mild, and visibility is generally strong.
- Daytime temperatures: 15–20°C at lower elevations, dropping to -5 to 5°C above 4,000m
- Clear mornings with occasional afternoon cloud build-up, especially in late May
- Rhododendron and magnolia blooms peak in March–April on routes like Poon Hill and Ghorepani
- Popular routes get busy - book accommodation and permits early for Everest Base Camp and Annapurna Circuit
Autumn
September – November
The most popular trekking season in Nepal. Post-monsoon skies are at their clearest, delivering the best mountain visibility of the year.
- Daytime temperatures: 10–18°C at lower elevations, -10 to 0°C above 4,000m
- Consistently clear skies with minimal rainfall following the monsoon
- Coincides with Dashain and Tihar, Nepal's major festivals - a rich cultural experience, though some services may run on reduced hours
- Peak season means higher demand for flights (especially Lukla) and teahouse beds - early booking is strongly recommended
Winter
December – February
Cold and quiet. High-altitude passes may close or become dangerous, but lower-elevation treks remain excellent with dramatically fewer crowds.
- Daytime temperatures: 5–12°C at lower elevations, well below freezing above 4,000m at night
- High passes like Thorong La (Annapurna Circuit) can close due to snow - routes involving high passes are not recommended without a flexible itinerary
- Lower-altitude treks (Poon Hill, Langtang lower sections, Mardi Himal base) remain very doable and offer crystal-clear mountain views with almost no other trekkers
- Requires proper cold-weather gear - a -20°C rated sleeping bag is strongly advised
Summer / Monsoon
June – August
Heavy rainfall across most of Nepal makes standard routes muddy, leech-prone, and often socked in with cloud. One major exception: the rain-shadow regions.
- Daily rainfall is common across the Everest, Annapurna, and Langtang regions, with poor mountain visibility
- Trails can be muddy and leeches are common at lower forested elevations
- Upper Mustang and Dolpo sit in the Himalayan rain shadow and receive very little monsoon rainfall - genuinely one of the best times to trek there
- Flight delays into Lukla and other mountain airstrips are more frequent due to cloud cover
How Altitude Changes the Climate
The single biggest factor in trail temperature isn’t the season - it’s elevation. A trek that starts in warm, humid lowland forest can end in below-freezing alpine conditions within a matter of days, regardless of the calendar month.
Mountain Visibility by Time of Day
Regardless of season, mornings almost always offer the clearest mountain views in Nepal. Cloud typically builds through the afternoon as warm valley air rises, often obscuring peaks by early afternoon even on otherwise clear days. This is why our itineraries schedule most trekking and viewpoint climbs - like Kala Patthar or Poon Hill - for early morning departures.
How We Plan Around Weather
Every itinerary we run is built with acclimatization and seasonal conditions in mind - not just distance and days. If weather forces a route change mid-trek, our guides adjust in real time rather than pushing through unsafe conditions.
Not sure which season fits your trip? Ask us →