The short answer
October and November for clarity, March and April for flowers. Monsoon brings leeches and cloud; winter closes some of the high lodges.
Key facts
- Oct to Nov
- Clear and busy
- Mar to Apr
- Warm, rhododendrons
- Dec to Feb
- Cold, snow at altitude
- Jun to Sep
- Rain and leeches
Season by season
October and November give the clearest air, stable weather and the busiest trails. March and April are warmer, with rhododendrons in bloom and a softer haze over the peaks. May is hotter, with more cloud later in the month.
Winter brings cold, quiet trails and crisp views, though snow can close high passes and some lodges at altitude. The monsoon, from June to September, is wet, with leeches on lower trails and views often hidden by cloud.
Choosing by trek
For short foothill treks such as Poon Hill, spring and autumn are best, and winter is possible with warm layers. For the Annapurna Circuit and high passes, choose the clear months and check the conditions at Thorong La.
The dry, high valley of Mustang, in the Annapurna rain shadow, is a good choice in the monsoon. Book flights, permits and lodges early for October, and keep spare days in your plan.
Insider tip
March and April add haze on the peaks but green and red on the lower hills; if you love rhododendrons, choose April.
Avoid this
Do not plan the Annapurna Circuit in deep winter without checking the pass conditions.
Related questions
Is the rainy season possible?
For the rain-shadow side near Mustang, yes; for most of the region, it is wet and cloudy.
Are the lodges open in winter?
Lower ones are; high ones may close.
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