December in Slavinsk is the windiest month of the year. In December, the weather in Slavinsk is typically freezing. Average daily high temperature in December is about zero. On average, Slavinsk has 14 cloudy, 10 snowy, 6 rainy, and 1 sunny day in December. The snowfalls are usually light. December as well as March and November is considered the most uncomfortable time to visit Slavinsk.