Planning for the weather is an important factor for making your trip to Phobjikha Valley a success, especially when you're splurging. 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 Phobjikha Valley are July, June, August, and September, with each month seeing an average of 17 inches of rainfall.