December in Dormagen is the rainiest, the windiest, and the cloudiest month of the year. In December, the weather in Dormagen is typically cold. Average daily high temperature in December is about 6 degrees above zero. On average, Dormagen has 23 rainy, 3 sunny, 3 cloudy, and 2 partly cloudy days in December. The rains are usually moderate. December as well as January, February, and November is considered the most uncomfortable time to visit Dormagen.