December in Sanyyakhtakh is the most freezing month of the year. In December, the weather in Sanyyakhtakh is typically freezing. Average daily high temperature in December is about 26 degrees below zero. On average, Sanyyakhtakh has 27 cloudy and 4 sunny days in December. December as well as January, February, March, and May is considered the most uncomfortable time to visit Sanyyakhtakh.