Winter in Bhutan is from mid-November through mid-March, with a dry climate, sunshine and clear skies. Typical winter daytime temperatures are 60-66F (16-19C) and nighttime temperature fall below zero. Spring from mid-March to mid-June is also an excellent time for trekking
and visiting with rhododendrons and other flowers blooming, comfortable
temperatures 70 - 85F (22-30C)and many festivals taking place in the
area. The monsoon usually arrives mid-June, with rain falling on and off during the afternoons and evenings. The rains do not dominate, however, and visitors enjoy nice temperatures, flowers, wildlife and fewer tourists. At the end of September, autumn suddenly arrives, and is a magnificent season for trekking which lasts through mid-November.