Taking into account the local weather in Sao Manuel is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually September and December with an average temp of 72°F, while the coldest months are July and June with an average of 64°F. The rainiest months in Sao Manuel are January, December, February, and November, with each month seeing an average of 9 inches of rainfall.