Trekking in Nepal can be carried out all the year round. Nepal comprises four major seasons and each season has its distinct attractions to offer. The seasons are categorized as follows:
Autumn season is considered as the ideal season for trekking. This season offers pleasant weather conditions, moderate temperature with clear sky and enticing mountain vistas. In addition trekkers would get opportunities to explore and local people’s festivals and culture because these months are festive season where most Hindu festivals in Nepal as Dashain and Tihar is observed .
Winter is the best season for trekking at lower elevation below 3500 meters .There is occasional snowfall only at higher altitude with risk winds and colder temperatures. Hence is ideal for trekking in the lower elevation where one can enjoy cool weather with spectacular views. Treks in the winter season are suitable for those who are keen in discovering the area of lowland.
Spring season in Nepal is also considered as ideal season to do the trekking and mountain climbing. This season offers diverse range of wild flowers blossoming particularly, rhododendrons above 3000 meters a haunting paradise during this season. The weather is mildly warm at lower altitude and quite moderate temperature at at higher elevation over 4000 meters which provide breathtaking mountain vistas. Spring season are suitable for average trekkers, it is not hard to view the high Himalayan valleys.
Summer is mainly rainy season in Nepal and involves monsoon with heavy downpour which is not suitable for trekking. The weather is hot and humid.However, it is a ideal season to trek in the rain shadow of desert parts of Nepal like Mustang, Nar-Phu valley and Dolpo regions. These times are blessed for the keen botanist and forest researchers as the higher valleys and meadows bloom with flowers and lush vegetation. The main advantages of trekking in the summer months are the trails without mass and less cold in the high mountains.