September in Selawik is the sunniest month of the year. In September, the weather in Selawik is typically cold. Average daily high temperature in September is about 7 degrees above zero. On average, Selawik has 9 sunny, 8 rainy, 7 partly cloudy, and 6 cloudy days in September. The rains are usually light. September as well as January, February, March, and August is considered the most uncomfortable time to visit Selawik.