Visiting local bars in Imperatriz is more fun in good weather. These temperatures and rainfall averages can help you decide the best time for bar hopping. The hottest months are usually September and August with an average temp of 84°F, while the coldest months are July and June with an average of 79°F. The rainiest months in Imperatriz are March, February, January, and April, with each month seeing an average of 10 inches of rainfall.