Weather will likely play an important role when you plan your trip to Vaiuru, 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 Vaiuru are February, March, December, and January, with each month seeing an average of 9 inches of rainfall.