In December, the weather in Bol'shaya Seya is typically freezing. Average daily high temperature in December is about 9 degrees below zero. On average, Bol'shaya Seya has 13 cloudy, 9 snowy, 5 partly cloudy, and 4 sunny days in December. The snowfalls are usually light. December as well as January, February, April, and May is considered the most uncomfortable time to visit Bol'shaya Seya.