December in Freiburg im Breisgau is the windiest and the cloudiest month of the year. 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 19 rainy, 8 cloudy, and 4 sunny days 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.