If you're hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Mbarara: The hottest months are usually February and January with an average temp of 71°F, while the coldest months are December and November with an average of 68°F. The rainiest months in Mbarara are October, September, November, and April, with each month seeing an average of 7 inches of rainfall.