In December, the weather in Ponta Grossa is typically warm. Average daily high temperature in December is about 26 degrees above zero. On average, Ponta Grossa has 19 rainy, 5 sunny, 5 partly cloudy, and 2 cloudy days in December. The rains are usually heavy. December as well as January, February, and March is considered the most uncomfortable time to visit Ponta Grossa.