Weather is probably a major factor when you plan your trip to Rurutu, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually February and March with an average temp of 78°F, while the coldest months are August and September with an average of 72°F. The rainiest months in Rurutu are February, March, January, and April, with each month seeing an average of 9 inches of rainfall.