If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Kariba: The hottest months are usually October and November with an average temp of 82°F, while the coldest months are July and June with an average of 70°F. The rainiest months in Kariba are January, February, December, and March, with each month seeing an average of 8 inches of rainfall.