November in Mainz is the cloudiest month of the year. In November, the weather in Mainz is typically cold. Average daily high temperature in November is about 8 degrees above zero. On average, Mainz has 17 cloudy, 11 rainy, and 2 sunny days in November. The rains are usually light. November as well as January, February, and December is considered the most uncomfortable time to visit Mainz.