December in Amersfoort averages a daily high of 6.8°C with nights around 1.7°C. Expect roughly 16.9 wet days totalling 81.8mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Amersfoort is May–September.
Based on DE BILT, NL (15.5km), 1995–2024. 30 years of December data.