In December, the weather in Kosh-Agach is typically freezing. Average daily high temperature in December is about 17 degrees below zero. On average, Kosh-Agach has 13 partly cloudy, 9 sunny, 5 cloudy, and 4 snowy days in December. The snowfalls are usually light. December as well as January, February, and November is considered the most uncomfortable time to visit Kosh-Agach.