In September, the weather in Balneário Camboriú is typically warm. Average daily high temperature in September is about 20 degrees above zero. On average, Balneário Camboriú has 19 rainy, 5 sunny, 4 cloudy, and 2 partly cloudy days in September. The rains are usually heavy. September as well as January, February, March, and October is considered the most uncomfortable time to visit Balneário Camboriú.