April in Sosnovyy Bor is the windiest month of the year. In April, the weather in Sosnovyy Bor is typically cold. Average daily high temperature in April is about 8 degrees above zero. On average, Sosnovyy Bor has 10 partly cloudy, 7 sunny, 6 rainy, 6 cloudy, and 1 snowy day in April. The rains are usually moderate. April as well as January, February, September, and October is considered the most uncomfortable time to visit Sosnovyy Bor.