In December, the weather in Kljuchi is typically freezing. Average daily high temperature in December is about 10 degrees below zero. On average, Kljuchi has 16 snowy, 7 sunny, 6 partly cloudy, and 2 cloudy days in December. The snowfalls are usually heavy. December as well as January, February, May, and October is considered the most uncomfortable time to visit Kljuchi.