Weather is probably a major factor when you plan your trip to Dharmanagar, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and March with an average temp of 81°F, while the coldest months are January and December with an average of 69°F. The rainiest months in Dharmanagar are May, June, August, and July, with each month seeing an average of 16 inches of rainfall.