If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Mbarara: The hottest months are usually February and January, with an average temperature of 21°C, while the coldest months are December and November, with an average of 20°C. The rainiest months in Mbarara are October, September, November and April, with each month seeing an average of 185 mm of rainfall.