In December, the weather in Balneário Camboriú is typically warm. Average daily high temperature in December is about 25 degrees above zero. On average, Balneário Camboriú has 23 rainy, 5 sunny, 2 cloudy, and 1 partly cloudy day in December. The rains are usually heavy. December as well as January, February, March, and September is considered the most uncomfortable time to visit Balneário Camboriú.