If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Hambantota: The hottest months are usually April and June with an average temp of 83°F, while the coldest months are January and February with an average of 80°F. The rainiest months in Hambantota are November, December, October, and April, with each month seeing an average of 8 inches of rainfall.