Normally, Nepal offers for all seasons trekking in Nepal Himalayas. As the different climate of seasons divided into six seasons.
1: Spring season – called in Nepali Basanta Ritu (February and March)
One hand the Spring is supposed one of the best trekking seasons in Nepal rather after mid-February and the season makes extraordinary by blooming cherry, blooming Rhododendron (up to 4000 m, approx) another hand not too bad to trek in Nepal at the beginning of Spring, it caused be snowfalls but you can do trekking in lower parts of Nepal Himalaya. As known that Nepal is an Agriculture country, Farmers of Nepal would be seen busy with planting maize and different kinds of vegetables in hilly regions. It is for sure that in different temperature (climate) seasons keep farming different crops (planting).
2: Summer – called in Nepali Grishma Ritu (April and May)
The summer is the hottest months of the year. The lowest part of the country temperature would be +40 DC (even more) and Himalaya glacier level temperature would be as high as +25 DC during day and night 0 to 4+ (normally, does not fall in minus). Regarding treks in Nepal with Summer notified one of the best trekking seasons. You can see still blooming rhododendron in the Nepal Himalaya and the weather is fine for domestic mountain flights in remote regions as well. During the time of the year, farmers kept engaged in their farming field to look after planting maize and vegetables.
3: Monsoon – called in Nepali Barkha Ritu (June and July)
Trekking during the monsoon season in Nepal is noticed not so good in the general concept. But Nepal is for all seasons to travel. Upper Mustang, Upper Dolpo, Tilicho Lake (first half Annapurna Circuit), Nar Phu and more are the rain shadow belt in Nepal Himalaya. These regions get very less rain now a day (due to global warming). So, above-mentioned regions are still suitable for trekking in monsoon also in Nepal. We, Nepal Kailash Trekking suggests you bring a raincoat if you are traveling to Nepal during monsoon season. The lower part of starting trekking gets rain for a couple of days. You can see planting the rice field (paddy), millets and at the same time of the year harvesting maize the months of June and July trekking in Nepal. During these months, farmers celebrate mud festival in Nepal in mid-June (special day)
4: Autumn – called in Nepali Sharad Ritu (August and September)
This is an early Autumn time. It is still getting rainfall. This is why still we suggest you the same regions as the monsoon season for trekking. If possible better reached the campsite before late afternoon because most of the time in the late afternoon gets rain and at night so far.
5: Late Autumn – called in Nepali Hemanta Ritu (October and November)
Ideally, the season of Autumn is elsewhere known that the best trekking season in Nepal. Trekking in October and November is neither cold nor hot. To be honest, we have many times record that flights have been canceled (for example Lukla sector) during October too due to bad weather (rainy and foggy). In the high range of the Himalaya, the weather is stable with clear blue sky during the day as well as most of the time at night too. Trekking in Nepal in late Autumn season is the high numbers of tourist visit to Nepal. This is why, all trails, lodges are occupied and sometimes you should have slept in the dining hall and dining floor so far. It is these are the months of harvesting in Nepal. The month of October and November celebrate the biggest festival of Nepal, it is called Dashain and as a second biggest festival celebrates Tihar (lighting festival). The most farming land has been golden scenery in the hilly regions during your trekking in Nepal.
6: Winter – Called in Nepali Shishir Ritu (December and January)
The time of the year is the dry season. Trekking in winter supposes something better with clear blue Nepal sky with the scenery of laughing white tooth mountains. But it is true that the colder months are of the year. During winter trekking in Nepal, you should keep priority against too cold by taking warm clothing. It is warm enough period of walking in a day, but evening and morning an extremely cold by comparing other seasons. If you are planning a trek to Nepal in winter then make sure you are taking enough warm sleeping bag. By the way, trekkers can get blankets too from the lodge, but which things will not be sufficient because of smell, which things not to use to wash as usual due to cold. It is for sure, each lodge keeps firewood heating system during your staying until dinner time after gets dark. The farmers normally get freer than other times, but, they take compost to the field for organic farming.