Taking into account the local weather in Santa Clara do Sul 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 74°F, while the coldest months are July and June with an average of 58°F. The rainiest months in Santa Clara do Sul are October, September, July, and January, with each month seeing an average of 7 inches of rainfall.