Taking into account the local weather in Novo Airão is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually September and October with an average temp of 83°F, while the coldest months are April and June with an average of 79°F. The rainiest months in Novo Airão are March, April, February, and January, with each month seeing an average of 18 inches of rainfall.