Weather will likely play an important role when you plan your trip to Nova Erechim, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually January and February, with an average temperature of 22°C, while the coldest months are July and June, with an average of 15°C. The rainiest months in Nova Erechim are October, May, December and June, with each month seeing an average of 243 mm of rainfall.