Weather will likely play an important role when you plan your trip to Barbacena, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually September and February, with an average temperature of 20°C, while the coldest months are July and August, with an average of 16°C. The rainiest months in Barbacena are December, November, January and February, with each month seeing an average of 257 mm of rainfall.