Weather is probably a major factor when you plan your trip to Sao Bento do Sul, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually January and February, with an average temperature of 20°C, while the coldest months are July and June, with an average of 14°C. The rainiest months in Sao Bento do Sul are January, December, February and October, with each month seeing an average of 247 mm of rainfall.