March in Greater Sudbury averages a daily high of 0.8°C with nights around -10.2°C. Expect roughly 14.6 wet days totalling 44.3mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Greater Sudbury is June–September.
Based on SUDBURY CLIMATE, ON CA (21.6km), 1995–2024. 11 years of March data.