Taking into account the local weather in Bumthang is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually August and July with an average temp of 58°F, while the coldest months are January and February with an average of 38°F. The rainiest months in Bumthang are July, June, August, and September, with each month seeing an average of 17 inches of rainfall.