December in Siniy Bor is the snowiest month of the year. In December, the weather in Siniy Bor is typically freezing. Average daily high temperature in December is about 9 degrees below zero. On average, Siniy Bor has 9 cloudy, 9 partly cloudy, 7 snowy, and 6 sunny days in December. The snowfalls are usually light. December as well as January, February, and October is considered the most uncomfortable time to visit Siniy Bor.