September in Severomorsk is the rainiest month of the year. In September, the weather in Severomorsk is typically warm. Average daily high temperature in September is about 10 degrees above zero. On average, Severomorsk has 15 rainy, 7 cloudy, 6 partly cloudy, and 2 sunny days in September. The rains are usually moderate. September as well as January, April, May, and June is considered the most uncomfortable time to visit Severomorsk.