December in Poronaysk is the snowiest and the windiest month of the year. In December, the weather in Poronaysk is typically freezing. Average daily high temperature in December is about 7 degrees below zero. On average, Poronaysk has 13 partly cloudy, 11 sunny, and 7 snowy days in December. The snowfalls are usually moderate. December as well as January, February, April, and May is considered the most uncomfortable time to visit Poronaysk.