December in Herning is the windiest month of the year. In December, the weather in Herning is typically cold. Average daily high temperature in December is about 4 degrees above zero. On average, Herning has 21 rainy, 7 cloudy, and 3 sunny days in December. The rains are usually moderate. December as well as January, February, March, and September is considered the most uncomfortable time to visit Herning.