January in Gatineau is the snowiest and the most freezing month of the year. In January, the weather in Gatineau is typically freezing. Average daily high temperature in January is about 4 degrees below zero. On average, Gatineau has 10 partly cloudy, 8 snowy, 6 sunny, 6 cloudy, and 1 rainy day in January. The snowfalls are usually moderate.