In December, the weather in Freiburg im Breisgau is typically cold. Average daily high temperature in December is about 4 degrees above zero. On average, Freiburg im Breisgau has 10 rainy, 9 partly cloudy, 6 cloudy, 5 sunny, and 1 snowy day in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Freiburg im Breisgau.