December in Belfort averages a daily high of 6.3°C with nights around 0.1°C. Expect roughly 13.8 wet days totalling 61.2mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Belfort is May–September.
Based on BASEL MULHOUSE, FR (49.3km), 1995–2024. 30 years of December data.