December in Winnipeg averages a daily high of -7.2°C with nights around -14.3°C. Expect roughly 9.3 wet days totalling 21.7mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Winnipeg is June–September.
Based on WINNIPEG THE FORKS, MB CA (1km), 1995–2024. 24 years of December data.