November in Mariehamn is the cloudiest month of the year. In November, the weather in Mariehamn is typically cold. Average daily high temperature in November is about 5 degrees above zero. On average, Mariehamn has 16 rainy, 11 cloudy, 2 sunny, and 1 partly cloudy day in November. The rains are usually moderate. November as well as January, March, October, and December is considered the most uncomfortable time to visit Mariehamn.