January in Dolbeau-Mistassini is the snowiest and the most freezing month of the year. In January, the weather in Dolbeau-Mistassini is typically freezing. Average daily high temperature in January is about 10 degrees below zero. On average, Dolbeau-Mistassini has 11 snowy, 8 partly cloudy, 7 sunny, and 5 cloudy days in January. The snowfalls are usually moderate. January as well as February, April, October, and November is considered the most uncomfortable time to visit Dolbeau-Mistassini.