If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Dimapur: The hottest months are usually May and June, with an average temperature of 26°C, while the coldest months are January and December, with an average of 17°C. The rainiest months in Dimapur are July, June, August and May, with each month seeing an average of 320 mm of rainfall.