January in Toronto averages a daily high of -0.1°C with nights around -6.6°C. Expect roughly 13.7 wet days totalling 60.8mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Toronto is June–September.
Based on TORONTO CITY, ON CA (4.4km), 1995–2024. 22 years of January data.