Weather will likely play an important role when you plan your trip to Teresópolis, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually February and January with an average temp of 72°F, while the coldest months are July and August with an average of 64°F. The rainiest months in Teresópolis are December, November, January, and March, with each month seeing an average of 13 inches of rainfall.