In September, the weather in Unalakleet is typically cold. Average daily high temperature in September is about 8 degrees above zero. On average, Unalakleet has 13 cloudy, 9 rainy, 5 sunny, and 3 partly cloudy days in September. The rains are usually light. September as well as January, February, March, and July is considered the most uncomfortable time to visit Unalakleet.