December in Valemount is the most freezing month of the year. In December, the weather in Valemount is typically freezing. Average daily high temperature in December is about 9 degrees below zero. On average, Valemount has 20 snowy, 7 cloudy, and 4 sunny days in December. The snowfalls are usually moderate. December as well as April, May, June, and July is considered the most uncomfortable time to visit Valemount.