October in Ostrov Bol'shoy Oleny is the rainiest month of the year. In October, the weather in Ostrov Bol'shoy Oleny is typically cold. Average daily high temperature in October is about 4 degrees above zero. On average, Ostrov Bol'shoy Oleny has 22 rainy, 7 cloudy, 1 sunny, and 1 partly cloudy day in October. The rains are usually moderate. October as well as April, May, August, and September is considered the most uncomfortable time to visit Ostrov Bol'shoy Oleny.