Planning for the weather is an important factor for making your trip to Nova Friburgo a success, especially when you're splurging. 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.