October in Frederikshavn is the rainiest month of the year. In October, the weather in Frederikshavn is typically warm. Average daily high temperature in October is about 11 degrees above zero. On average, Frederikshavn has 16 rainy, 8 partly cloudy, 5 sunny, and 2 cloudy days in October. The rains are usually heavy. October as well as January, February, March, and April is considered the most uncomfortable time to visit Frederikshavn.