March in Dundalk averages a daily high of 13.1°C with nights around 4.1°C. Expect roughly 10.7 wet days totalling 88.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Dundalk is April–May.
Based on MARYLAND SCIENCE CENTER, MD US (8.5km), 1995–2024. 24 years of March data.