February in Flensburg is the cloudiest month of the year. In February, the weather in Flensburg is typically cold. Average daily high temperature in February is about 3 degrees above zero. On average, Flensburg has 17 rainy, 9 cloudy, 2 sunny, and 1 partly cloudy day in February. The rains are usually moderate. February as well as January, March, September, and October is considered the most uncomfortable time to visit Flensburg.