Best Time to Go
Throughout the region, the climate varies widely depending on the elevation. Higher elevations mean colder temperatures. Always carry some warm clothing regardless of season.
Bhutan: In the northern parts of the country weather conditions are like the arctic; while southern areas are hot and humid in the summer and cool in winter. Spring (March-May) is a favorite time to visit when flowers were in bloom. Autumn (late September – November), too, is a popular time when the weather is warm, dry and sunny.
Nepal: Monsoon season begins around the end of June and lasts until the middle of September. Spring and autumn are the most pleasant seasons. Winter temperatures drop to freezing, with a high level of snowfall in the mountains. Summer and late spring temperatures mildly hot in the hill regions to extremely hot in the southern, outer foothills of the Himalayas. In winter, temperatures in the south can average 7ºC/45ºF and a mild 23ºC/74ºF. The central valleys often are below freezing. The Kathmandu Valley, at an altitude of 1,310m (4,297ft), are relatively mild all year.
Tibet: May to October is the best time to travel in Tibet, when temperatures average above 10°C/50°F. This is also the busiest travel time in Tibet. If you plan to visit Mt. Everest, April, May, September, or October are when the peak is most visible.
Note: The ideal time for trekking and for travelling throughout the region is from late September to late November.Spring, from March to May, is the second-best time to visit Bhutan for touring and trekking.