December in Kosh-Agach is the windiest month of the year. In December, the weather in Kosh-Agach is typically freezing. Average daily high temperature in December is about 13 degrees below zero. On average, Kosh-Agach has 17 sunny and 14 partly cloudy days in December. December as well as January, February, April, and November is considered the most uncomfortable time to visit Kosh-Agach.