In December, the weather in Komsomolsk-at-Amur is typically freezing. Average daily high temperature in December is about 16 degrees below zero. On average, Komsomolsk-at-Amur has 22 cloudy, 7 snowy, and 2 sunny days in December. The snowfalls are usually light. December as well as January, February, April, and October is considered the most uncomfortable time to visit Komsomolsk-at-Amur.