August in Freiburg im Breisgau is the sunniest month of the year. In August, the weather in Freiburg im Breisgau is typically warm. Average daily high temperature in August is about 22 degrees above zero. On average, Freiburg im Breisgau has 16 sunny, 12 rainy, and 3 partly cloudy days in August. The rains are usually moderate.