December in Metz averages a daily high of 4.4°C with nights around 0.2°C. Expect roughly 16.6 wet days totalling 85.2mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Metz is June–September.
Based on BERUS, GM (40.8km), 1995–2024. 29 years of December data.