March in Haarlem averages a daily high of 10.2°C with nights around 2.8°C. Expect roughly 12.6 wet days totalling 51.5mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Haarlem is May–September.
Based on SCHIPHOL, NL (12.7km), 1995–2024. 30 years of March data.