If you want to explore when it's less crowded, head here in April. You're likely to snag cheaper Tangará da Serra hotels with breakfast included then. The warmest conditions are in September, with temperatures ranging from 72ºF (22ºC) to 99ºF (37ºC). It's often coolest in June, averaging between 64ºF (18ºC) and 84ºF (29ºC).