Weather in Bhutan is highly influenced by altitude. In the northern regions where mountains rise as high as 7,000m / 22,966feet, the weather conditions are similar to that of the arctic, frozen, and frosty. Mountain peaks are continually covered in snow and lower parts are still cool even in summers because of the high-altitude topography.
Towards the southern belts, the weather is hot and humid in the summer and cool during winter. Temperatures can vary between 15-30ºC (59-86ºF) in these regions.
The central parts of the country have temperate and deciduous forests where the climate is more seasonal with warm summers and cool, dry winters. In general, the climate of Bhutan is extremely varied – one due to the variation in altitude and two, due to the influence of north Indian monsoons.
Bhutan has four distinct seasons namely spring, summer, autumn (or fall), and winter.
Spring season (March-May):
The Spring season, during the months between March and May, is perhaps the best time to visit Bhutan. The average daytime temperature in this season is 17ºC (63ºF) and the average nighttime temperature falls to 7ºC (45ºF). Springtime also makes for an incredible hike in the tranquil trails of Bhutan’s distant locations in the wilderness.
Summer season (June – August):
The summer season, during the months between June and August, experiences wet weather in almost all parts of the country as it also marks the arrival of the monsoon. The average daytime temperature in this season is 24ºC (75ºF) and the average nighttime temperature falls to 14ºC (57ºF).
Autumn or the fall season (October – December):
Autumn or fall, during the months between October and December, is also an ideal time to visit Bhutan as the weather is very mild although there may not be flowers blooming in the valleys. The average daily temperature in this season is 22ºC (71ºF) and the average nighttime temperature falls to 12ºC (54ºF). During this season the visibility of the mountains is sparkling clear and the weather is still warm until mid-November.
Winter season (December – February):
The Winter season, during the months between December and February, is comparatively the coldest time of the year. The average daytime temperature in this season is 10ºC (50ºF) and the average nighttime temperature falls to 0ºC (32ºF). The icy winds of the northeast monsoon make the climate colder. January is the coldest month of the ye
