Weather is probably a major factor when you plan your trip to Nandaime, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and March with an average temp of 81°F, while the coldest months are January and February with an average of 80°F. The rainiest months in Nandaime are October, September, June, and August, with each month seeing an average of 17 inches of rainfall.