In December, the weather in Fairbanks is typically freezing. Average daily high temperature in December is about 12 degrees below zero. On average, Fairbanks has 10 cloudy, 10 partly cloudy, 8 sunny, and 3 snowy days in December. The snowfalls are usually light. December as well as January, February, April, and September is considered the most uncomfortable time to visit Fairbanks.