In September, the weather in Ust-Izhma is typically warm. Average daily high temperature in September is about 10 degrees above zero. On average, Ust-Izhma has 14 rainy, 7 cloudy, 6 partly cloudy, and 3 sunny days in September. The rains are usually moderate. September as well as January, February, May, and October is considered the most uncomfortable time to visit Ust-Izhma.