October in Ust-Bolshereck is the rainiest month of the year. In October, the weather in Ust-Bolshereck is typically cold. Average daily high temperature in October is about 8 degrees above zero. On average, Ust-Bolshereck has 18 rainy, 7 partly cloudy, 3 sunny, and 3 cloudy days in October. The rains are usually heavy. October as well as May and September is considered the most uncomfortable time to visit Ust-Bolshereck.