Weather is probably a major factor when you plan your trip to Nova Friburgo, but bear 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 temperature of 22°C, while the coldest months are July and August, with an average of 17°C. The rainiest months in Nova Friburgo are December, November, January and March, with each month seeing an average of 356 mm of rainfall.