In December, the weather in Sayanogorsk is typically freezing. Average daily high temperature in December is about 9 degrees below zero. On average, Sayanogorsk has 16 cloudy, 10 snowy, 4 sunny, and 1 partly cloudy day in December. The snowfalls are usually light. December as well as January, February, April, and October is considered the most uncomfortable time to visit Sayanogorsk.