If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Kisumu: The hottest months are usually February and March with an average temp of 75°F, while the coldest months are June and July with an average of 71°F. The rainiest months in Kisumu are April, May, November, and October, with each month seeing an average of 12 inches of rainfall.