Trekking Season in Nepal Information
With the highest mountains in the world, Nepal has tremendous variation in climates. In Nepal, the lowland plains are tropical and midland hills are temperate while the high mountains have sub-arctic and arctic conditions. However, spring and autumn are regarded as the best trekking seasons in Nepal; you can go for various sightseeing tours and other walking holidays in Nepal all the year round. Summer and winter seasons are popular among trekkers while spring and autumn seasons are popular among the adventure seekers and thrill lovers. And among all these seasons, spring season is the most popular and considered the best season for trekking tourism in Nepal. During the off-seasons, you still have many possibilities of wonderful tours and other activities in Nepal.

Trekking in Autumn Season
Trekking in September:
September is the end of Monsoon already. So, most of the trekking routes are opened (in the sense of weather and snow blocks) in this season. You can expect better visibility and fresh air. The most popular and important Nepalese festivals (Dashain & Tihar) fall during September. September is also the beginning of peak season for traveling in Nepal. Therefore, traveling in January in most of the routes in Nepal would be fine.
Trekking in October:
As autumn season weather is clear to see the spectacular mountains, scenery and landscapes in Nepal. There will so less chances of raining in October. So, trekking in October in Nepal would also be fine for you.
Trekking in November:
November would be the best season for you, if you are planning trekking in Nepal Himalayas. There will be almost no chances of raining in November and the weather is very clear during this month.

Trekking in Winter Season
Trekking in December:
December is also considered fine time to trek in lowlands of Nepal. In winter, trekking in the higher Himalayas is not possible because of heavy snowfalls. December still holds the plenty of clear sky and this season is suitable for Annapurna Trekking and Langtang Valley Trek.
Trekking in January:
In January, the weather is cold and has poor visibility due to fog. If you want to visit Nepal during the month of January, it is necessary to wear enough warm cloths. This time will be the coldest time of the year. So, trekking in higher lands in Nepal is not advisable during this season.
Trekking in February:
In fact, February would be great month for trekking in Nepal. And the weather does not rule out any area. You can see clear mornings and wonderful visibility. Poonhill, Everest Panorama and Langtang Trekking packages would be better options for you.

Trekking in Spring Season
Trekking in March:
Trekking in March is the perfect and best time for mountain trekking in Nepal. You can witness the varieties of blooming wild flowers and most notably the rhododendrons. Annapurna Base Camp Trekking, Tamang Heritage Treks, Ghorepani Trek would be some example trips during this period.
Trekking in April:
During April, it is mildly warm at lower elevations and at higher elevations over 4000 meters; you can get the superb and excellent mountain views. Temperature is quite moderate. Mountain slopes are covered with beautiful and colorful flowers.
Trekking in May:
During May, the weather will be warm by day and cool in the evenings. There will also be a chance of rain, especially in the afternoons. This the second biggest traditional trekking season in Nepal and it would be great time to do trekking in mountain region. May has the advantage of more alpine flowers.

Trekking in Summer Season
Trekking in June:
And trekking in this season is good for the keen botanist as the higher valleys and meadows blossom with flowers and lush vegetation. Trekking in summer season is not recommended. The weather is hot and wet at summer season.
Trekking in July:
Dolpo Trekking and Mustang Trekking regions will be traditional monsoon destinations in Nepal. But trekking in Nepal Himalayas during this season is not advisable.
Trekking in August:
As August is the Monsoon season, this is not highly recommended for outdoor activities including trekking. But there is equally ample possibility to do some wonderful trekking in the area with no rain or very little rain.