January in Fort Nelson is the snowiest and the most freezing month of the year. In January, the weather in Fort Nelson is typically freezing. Average daily high temperature in January is about 15 degrees below zero. On average, Fort Nelson has 11 partly cloudy, 8 snowy, 7 sunny, and 5 cloudy days in January. The snowfalls are usually light. January as well as February and December is considered the most uncomfortable time to visit Fort Nelson.