February in Mainz is the windiest month of the year. In February, the weather in Mainz is typically cold. Average daily high temperature in February is about 5 degrees above zero. On average, Mainz has 9 cloudy, 8 rainy, 7 partly cloudy, 4 sunny, and 1 snowy day in February. The rains are usually moderate. February as well as January, March, April, and October is considered the most uncomfortable time to visit Mainz.