May in Zaanstad averages a daily high of 17.9°C with nights around 8.7°C. Expect roughly 12 wet days totalling 60mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Zaanstad is May–September.
Based on SCHIPHOL, NL (15.4km), 1995–2024. 30 years of May data.