If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Maha Sarakham: The hottest months are usually April and March with an average temp of 86°F, while the coldest months are January and December with an average of 77°F. The rainiest months in Maha Sarakham are September, July, August, and May, with each month seeing an average of 11 inches of rainfall.