July in Wŏnsan averages a daily high of 26.9°C with nights around 20.1°C. Expect roughly 20 wet days totalling 170.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Wŏnsan is September–October.
Based on WONSAN, KN (3.5km), 1995–2024. 23 years of July data.