Although the country expanse is quite small Bhutanese weather varies from location to location mainly depending upon the elevation.
In the North of Bhutan on the borders with Tibet it is perennially covered with snow.
In the western, central and eastern Bhutan (Ha, Paro, Thimphu, Wandue, Trongsa, Bumthang, Trashi Yangtse, Lhuntse) you will mostly experience cold European-like weather. Winter lasts here from November to March.
Punakha is an exception as it is in a lower valley and summer is pretty hot but winter is pleasant.
Southern Bhutan bordering with India is hot and humid with a sub-tropical climate. The monsoon is the determining factor for rain here.
Best time to visit Bhutan:
Spring and autumn are the best season to visit Bhutan.
There are four distinct seasons similar in their divisions to those of Western Europe. The Monsoon occurs between June and August when the temperature is normally between 8° and 21°C (46°-70°F). Temperatures drop dramatically with increases in altitude. Days are usually very pleasant (average about 10°C/50°F) with clear skies and sunshine. Nights are cold and require heavy woolen clothing, particularly in winter.
Generally, October, November and April to mid-June are the best times to visit – rainfall is at a minimum and temperatures are conducive to active days of sightseeing. The foothills are also very pleasant during the winter.
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