January in Saint-Hyacinthe averages a daily high of -4.8°C with nights around -14°C. Expect roughly 13.4 wet days totalling 70.8mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Saint-Hyacinthe is May–September.
Based on ST HYACINTHE 2, QC CA (7.8km), 1995–2024. 26 years of January data.