December in Omutninsk is the windiest month of the year. In December, the weather in Omutninsk is typically freezing. Average daily high temperature in December is about 9 degrees below zero. On average, Omutninsk has 19 snowy, 11 cloudy, and 1 sunny day in December. The snowfalls are usually moderate. December as well as January, February, April, and September is considered the most uncomfortable time to visit Omutninsk.