When you travel with your pet, keeping track of the weather can help you make the trip more safe and fun for everyone. The hottest months are usually January and February with an average temp of 69°F, while the coldest months are July and June with an average of 58°F. The rainiest months in Sao Bento do Sul are January, December, February, and October, with each month seeing an average of 10 inches of rainfall.