December in Sint-Niklaas averages a daily high of 7.2°C with nights around 2.4°C. Expect roughly 16 wet days totalling 78.7mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Sint-Niklaas is May–September.
Based on WESTDORPE, NL (20.8km), 1995–2024. 30 years of December data.