December in Frederikshavn is the windiest month of the year. In December, the weather in Frederikshavn is typically cold. Average daily high temperature in December is about 4 degrees above zero. On average, Frederikshavn has 20 rainy, 6 cloudy, 4 sunny, and 1 partly cloudy day in December. The rains are usually moderate. December as well as January, February, October, and November is considered the most uncomfortable time to visit Frederikshavn.