Visiting local bars in Alta Floresta is better when you know what the weather holds. These temperatures and rainfall averages can help you choose the best time for bar hopping. The hottest months are usually September and August with an average temp of 81°F, while the coldest months are July and June with an average of 79°F. The rainiest months in Alta Floresta are March, January, February, and December, with each month seeing an average of 17 inches of rainfall.