December in Les Rivières averages a daily high of -2.8°C with nights around -9.7°C. Expect roughly 14.7 wet days totalling 102.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Les Rivières is June–September.
Based on STE FOY U. LAVAL, QC CA (4km), 1995–2024. 26 years of December data.