If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Varzea Grande: The hottest months are usually September and October, with an average temperature of 29°C, while the coldest months are July and June, with an average of 26°C. The rainiest months in Varzea Grande are January, February, March and December, with each month seeing an average of 246 mm of rainfall.