In December, the weather in Pervomayskiy is typically freezing. Average daily high temperature in December is about 9 degrees below zero. On average, Pervomayskiy has 18 cloudy, 5 sunny, 5 partly cloudy, and 3 snowy days in December. The snowfalls are usually light. December as well as January, February, April, and October is considered the most uncomfortable time to visit Pervomayskiy.