Weather is probably a major factor when you plan your trip to Dirang, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and September with an average temp of 81°F, while the coldest months are January and December with an average of 67°F. The rainiest months in Dirang are June, July, August, and May, with each month seeing an average of 21 inches of rainfall.