If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Dimapur: The hottest months are usually May and June with an average temp of 78°F, while the coldest months are January and December with an average of 63°F. The rainiest months in Dimapur are July, June, August, and May, with each month seeing an average of 13 inches of rainfall.