March in Wŏnsan averages a daily high of 10°C with nights around 0.8°C. Expect roughly 9 wet days totalling 43.1mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Wŏnsan is September–October.
Based on WONSAN, KN (3.5km), 1995–2024. 23 years of March data.