Best Trekking Session
It is an excellent question, and there is no definitive answer to that question. The trekking season in Nepal varies from year to year by days or even weeks. The weather in the Himalayas and Nepal can change very quickly and use it for guidance in every month listed.
-Everest Base Camp: (Autumn season from October to December and Spring Season from February to May)
Three Passes Trek: (Autumn season from October to November and Spring Season from March to May)
-Gokyo Trek: (Autumn season from October to December and Spring Season from February to May
-Annapurna Sanctuary Trek: (Autumn -winter and Spring season from October – May)
-Annapurna Circuit Trek: Autumn season (October – November) and Spring season (March – April).
-Mardi Himal Trek: October to November and March to April.
-Upper Mustang Trek: Ideal for the rainy season (May – October)
-Dhaulagiri Circuit Trek: Very weather dependent all year round due to avalanche danger.
-Manaslu Circuit Trek: Mid-March to May and October to Mid-December
-Lower & Upper Dolpo Trek: May to October
-Kanchenjunga Circuit Trek: October to November and March to May
-Helambu Circuit: October to April
-Great Himalayan Trails: Starting time generally October