Nepal is a country with huge geographical diversity with altitudes ranging from as low as 59 m to 8848 m. As a result, the climate of Nepal is diverse. There are eight climate zones in Nepal- Tropical, Sub-Tropical, Temperate, Sub-Alpine, Alpine, Nival and Trans-Himalayan. So, travelers or trekkers will need to know about the best time to visit Nepal so that they can prepare well according to the season. For traveling around Nepal, Spring and Autumn are two best seasons. However, the huge diversity of climatic regions makes Nepal suitable to be visited all year round. There are four climatic seasons in Nepal-Summer, Autumn, Winter, and Spring.
This is the time of rainfall and hot sunny days. The amount of rainfall is high in the eastern part gradually decreasing towards the west. Trekking in the high region is not so suitable because the views of mountains are usually blocked by clouds with rainfalls. But trekking in the Trans-Himalayan region like Upper Mustang, Upper Dolpo or Nar Phu can be done because these places receive very minimum or no rainfall.
This is the best time to visit Nepal. The weather is moderate with clear skies. Views of snow-capped mountains can be seen very clearly. Festivals like Dashain and Tihar are celebrated all over Nepal during this period of time. Most of the tourist destination is crowded during this time as a result of perfect weather conditions.
High regions are mostly covered by snow but the skies are clear and most of the lodge and teahouse in this region are closed. So, trekking in this region will be very difficult. But you can visit valleys, go jungle safari and trek around the lower parts of Nepal.
This is also a good time to visit Nepal. You can see hills full of Rhododendron forest in most of the popular trekking destinations. Festivals like Holi and Nepali New Year falls in this season. The weather is moderate but the skies are not clear as in Autumn as we can experience rainfall sometimes.