In September, the weather in Severomuysk is typically cold. Average daily high temperature in September is about 5 degrees above zero. On average, Severomuysk has 15 rainy, 5 partly cloudy, 4 sunny, 4 cloudy, and 2 snowy days in September. The rains are usually moderate. September as well as January, February, March, and May is considered the most uncomfortable time to visit Severomuysk.