April in Osinnik is the rainiest and the windiest month of the year. In April, the weather in Osinnik is typically cold. Average daily high temperature in April is about 5 degrees above zero. On average, Osinnik has 25 rainy and 5 cloudy days in April. The rains are usually moderate. April as well as January, February, September, and October is considered the most uncomfortable time to visit Osinnik.