In April, the weather in Freiburg im Breisgau is typically warm. Average daily high temperature in April is about 13 degrees above zero. On average, Freiburg im Breisgau has 16 rainy, 8 sunny, 5 partly cloudy, and 1 cloudy day in April. The rains are usually heavy. April as well as January, February, March, and May is considered the most uncomfortable time to visit Freiburg im Breisgau.