The early mid-summer period (June and July) is best time to visit Paro, which may experience occasional heavy falls of rain during the afternoons, like the rest of Bhutan, giving rise to much verdant greenery and Paro valley is full of clear streams and waterfalls during this time. While the grand Himalayan vistas may not be in the cards at this time, the relatively warm weather and fewer tourists make this a pleasant time to be here.
The most popular season to plan Bhutan holidays is during the spring season (late March, April & May) and autumn season (late September, October & November) due to the clear, mild weather, excellent scenery, lower rainfall and the range of traditional Paro festivals.
December to mid-March; Paro like Thimphu, normally experiences only light dustings of snow so this is also a feasible option for visitors, especially those acclimatised to snow, while mid-December to mid-January brings pleasant days with a nip in the wind and clear skies, with temperatures falling below zero at night. Paro vacation planner recommends avoiding this month.