Visiting local bars in Araguaina is more fun when you know what the weather holds. These rainfall averages and temperatures can help you decide the best time for bar hopping. The hottest months are usually September and August with an average temp of 83°F, while the coldest months are July and June with an average of 80°F. The rainiest months in Araguaina are March, February, January, and December, with each month seeing an average of 13 inches of rainfall.