Taking into account the local weather in Vitória das Missões is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually January and December with an average temp of 75°F, while the coldest months are July and June with an average of 59°F. The rainiest months in Vitória das Missões are October, November, May, and January, with each month seeing an average of 8 inches of rainfall.