December in Pervomajsk is the windiest month of the year. In December, the weather in Pervomajsk is typically cold. Average daily high temperature in December is about 1 degree above zero. On average, Pervomajsk has 19 cloudy, 5 sunny, 3 rainy, 2 snowy, and 2 partly cloudy days in December. The rains are usually moderate. December as well as February, March, and November is considered the most uncomfortable time to visit Pervomajsk.