December in Nijmegen averages a daily high of 6.1°C with nights around 1.3°C. Expect roughly 17.3 wet days totalling 78.2mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Nijmegen is May–September.
Based on KLEVE, GM (18.9km), 1995–2024. 29 years of December data.