If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Uturoa: The hottest months are usually March and April with an average temp of 80°F, while the coldest months are August and September with an average of 77°F. The rainiest months in Uturoa are January, February, December, and November, with each month seeing an average of 11 inches of rainfall.