Taking into account the local weather in São Joaquim is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually January and February with an average temp of 66°F, while the coldest months are July and June with an average of 53°F. The rainiest months in São Joaquim are October, September, January, and May, with each month seeing an average of 7 inches of rainfall.