In October, the weather in Ust'-Sema is typically cold. Average daily high temperature in October is about 5 degrees above zero. On average, Ust'-Sema has 17 rainy, 7 sunny, 5 cloudy, and 2 partly cloudy days in October. The rains are usually moderate. October as well as January, April, and May is considered the most uncomfortable time to visit Ust'-Sema.