December in Grande Prairie averages a daily high of -5.5°C with nights around -14.7°C. Expect roughly 8.3 wet days totalling 13.1mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Grande Prairie is May–September.
Based on BEAVERLODGE RCS, AB CA (38.1km), 1995–2024. 22 years of December data.