If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Moorea-Maiao: The hottest months are usually March and February with an average temp of 81°F, while the coldest months are August and September with an average of 77°F. The rainiest months in Moorea-Maiao are January, February, December, and March, with each month seeing an average of 12 inches of rainfall.