December in North Bay averages a daily high of -3.8°C with nights around -11.6°C. Expect roughly 18 wet days totalling 72.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit North Bay is June–September.
Based on NORTH BAY A, ON CA (6.7km), 1995–2024. 18 years of December data.