In September, the weather in Ust-Shish is typically warm. Average daily high temperature in September is about 12 degrees above zero. On average, Ust-Shish has 14 rainy, 11 cloudy, 3 sunny, and 2 partly cloudy days in September. The rains are usually light. September as well as January, February, April, and October is considered the most uncomfortable time to visit Ust-Shish.