December in L'Ancienne-Lorette is the snowiest month of the year. In December, the weather in L'Ancienne-Lorette is typically freezing. Average daily high temperature in December is about 5 degrees below zero. On average, L'Ancienne-Lorette has 17 snowy, 6 cloudy, 4 partly cloudy, 3 sunny, and 1 rainy day in December. The snowfalls are usually heavy.