Best Trekking season in Nepal: Since Nepal is a country of diversification with its geography and climate, a nature lover can always make it as his destination of trekking year round. There are normally four seasons are considered in Nepal, each of which has its own particular attraction to offer.
Autumn (Sep-Oct- Nov) : The best season offering excellent weather and out standing mountain views.
Spring (March-April- May) : The second finest trekking season. The temperature is quite moderate, especially the rhododendrons are in complete blossom and the the mountain views are excellent.
Summer ( June- July-August) : this is the most preferable season to trek in the rain shadow areas like Mustang, Upper Manang and Dolpo. These places are out of reach of the rain clouds because of the huge mountains and are unaffected by the monsoon. This season is also recommended for forest researchers and botanist. Warning-raincoats and insect repellents are strictly necessary in this period.
Winter (December- January- February) : suitable season for trekking at lower altitude, generally below 3000m.
Best Season for Peak Climbing and expedition : Nepal is Himalaya Kingdom and we have Many Mountain over 6000 m to 8850m witch is Highest Mountain in the world. Autumn (Sep-Oct- Nov) : The best season for Trekking Peak climbing which is above 5600 m till 6600m.but in August, September and on till second week of October, it is possible to do High Mountain Expedition as well.
Spring (March-April- May) : The Best Time for High Mountain Expedition.
Summer ( June- July) : This months are not good for climbing.
Winter (December- January- February) : This months also not good for Climbing.
Best Season for Mountain Biking in Nepal and Tibet:
1. October is the best time for Biking in Nepal Himalaya: we have two Best Mt.Bike Rout over 5416m,Throngpass and 5360m,Tilicho Lake. but another Route is possible do in October November and march, April and May.
2. June, July, August and September is the Best time for biking in Tibet: (Top of the Roof) : This is The Best Time for in Tibe