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 6 degrees above zero. On average, Ust-Bolshereck has 28 rainy, 2 sunny, and 1 cloudy day in October. The rains are usually heavy. October as well as May, August, September, and November is considered the most uncomfortable time to visit Ust-Bolshereck.