In April, the weather in Ust-Sosnovo is typically cold. Average daily high temperature in April is about 7 degrees above zero. On average, Ust-Sosnovo has 13 rainy, 12 cloudy, 3 sunny, and 2 partly cloudy days in April. The rains are usually moderate. April as well as January, February, October, and December is considered the most uncomfortable time to visit Ust-Sosnovo.