January in Whitehorse is the snowiest and the windiest month of the year. In January, the weather in Whitehorse is typically freezing. Average daily high temperature in January is about 10 degrees below zero. On average, Whitehorse has 20 cloudy, 7 snowy, and 4 sunny days in January. The snowfalls are usually light. January as well as February, April, July, and September is considered the most uncomfortable time to visit Whitehorse.