October in Bolshoy Sundyr is the rainiest month of the year. In October, the weather in Bolshoy Sundyr is typically cold. Average daily high temperature in October is about 6 degrees above zero. On average, Bolshoy Sundyr has 15 rainy, 13 cloudy, 2 sunny, and 1 partly cloudy day in October. The rains are usually moderate. October as well as January, April, September, and November is considered the most uncomfortable time to visit Bolshoy Sundyr.