March in Seongnam-si averages a daily high of 10.9°C. Expect roughly 4 wet days totalling 45.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Seongnam-si is June.
Based on SEOUL CITY, KS (20.8km), 1995–2024. 21 years of March data.