April in Ostrov Bol'shoy Oleny is the cloudiest month of the year. In April, the weather in Ostrov Bol'shoy Oleny is typically cold. Average daily high temperature in April is about zero. On average, Ostrov Bol'shoy Oleny has 15 cloudy, 9 rainy, 5 snowy, and 1 sunny day in April. The rains are usually light. April as well as May, August, September, and October is considered the most uncomfortable time to visit Ostrov Bol'shoy Oleny.