December in Alphen aan den Rijn averages a daily high of 7°C with nights around 2°C. Expect roughly 17.6 wet days totalling 80.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Alphen aan den Rijn is May–September.
Based on SCHIPHOL, NL (22.7km), 1995–2024. 30 years of December data.