March in Heerlen averages a daily high of 10.8°C with nights around 2.7°C. Expect roughly 13.2 wet days totalling 56.7mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Heerlen is May–September.
Based on MAASTRICHT, NL (15.6km), 1995–2024. 30 years of March data.