May in Muan averages a daily high of 22.3°C with nights around 13.1°C. Expect roughly 7.8 wet days totalling 77.4mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Muan is September–October.
Based on MOKPO, KS (21.1km), 1995–2024. 23 years of May data.