Bhutan weather: three climates in one day's drive

How it works

Elevation is the weather map

Bhutan runs from 97 m on the southern border to 7,570 m at Gangkhar Puensum, and that vertical span — not latitude — decides the weather. Drive north from the border in a single day and you cross three climates: subtropical Phuentsholing at 293 m, the temperate Paro valley at 2,266 m, and the alpine Chele La pass at 3,988 m. The rule of thumb, measured at Bhutan's own weather stations rather than lifted from a textbook: it gets roughly 5 °C cooler for every 1,000 m you climb.

The calendar adds the second axis. The southwest monsoon normally arrives in early June and drops roughly two-thirds to three-quarters of the year's rain by the end of September; October through February brings the clearest Himalayan skies, with sunny valley days and freezing nights. Spring sits in between — warming, flowering, and slowly hazing up toward the rains.

When to come

The short answer on timing

March–May and late September–November are the classic windows: dry, mild and festival-dense. Autumn wins for mountain views, spring for flowers, winter is quietly excellent, and the monsoon is a trade-off worth understanding rather than dismissing. The full comparison — with NCHM climate normals for six towns, every month of the year — lives on the best time to visit Bhutan guide.