March in Haeju averages a daily high of 9.7°C with nights around 0.6°C. Expect roughly 5 wet days totalling 32.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Haeju is September–October.
Based on HAEJU, KN (1.5km), 1995–2024. 23 years of March data.