While travelling Nepal, it is wise to know about climatic season. Normally, Trekking season is categories in 4 different climatic seasons:
Spring (March, April, May):
During this time, temperature is mildly warm in low lands while moderate in higher altitudes with plenty of opportunities to have astonishing views of the mountains and landscape. At this time, the blossom flowers especially national flower of Nepal – rhododendron decorate the ascending altitudes with its generous color and beauty. Even the High altitude lodges get opened and get occupied with the mountain lovers.
Summer (June, July, and August):
This is also the monsoon season in Nepal. At this time, the weather is hot and wet at times. It rains almost every day with occasional thunderstorms in the evening. The rain spreads the pleasantness around with lush green vegetation. If you are planning to trek in this season, we suggest to choose rain shaded areas of Nepal. Even, if you do not mind rain, and wants to trek in this season, you should compulsorily bring umbrella, pancho, proper waterproof hiking boots, wind proof jackets, baggage wrap, and raincoat as well as required insect repellent. Likewise, the reward of this month is the view of lush green valley captured by small flowers. It is a wonderful time to observe monsoon cycle of agriculture and the traditional life of Nepalese people.
Autumn (September, October and November):
This time is considered to be the best tourist season in Nepal with the end of summer and the winter to set in. The weather is highly pleasant so are the mountain views. The trekking routes get beautified with the presence of trekkers and expedition groups. Meantime, most of the festivals of Nepalese societies are enthusiastically celebrated at this time.
Winter (December, January and February):
During this time, the weather is cool and the sky is clear with occasional snowfalls at higher elevations. At this time, trekking in lower elevation is fine however, at the high altitude, most of the lodges get closed and it will be a bit difficult to cross high altitude passes. This season is good for trekking in lower elevations. The morning and night get extreme cold sometime reaching temperature at (-) minus but the days are warm and pleasant.