May in Nieuwegein averages a daily high of 18.4°C with nights around 8°C. Expect roughly 12.4 wet days totalling 65.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Nieuwegein is May–September.
Based on DE BILT, NL (10.3km), 1995–2024. 30 years of May data.