March in Passau is the windiest month of the year. In March, the weather in Passau is typically cold. Average daily high temperature in March is about 7 degrees above zero. On average, Passau has 9 rainy, 9 partly cloudy, 7 sunny, and 6 cloudy days in March. The rains are usually moderate. March as well as January, February, April, and November is considered the most uncomfortable time to visit Passau.