September in Ŭndŏk averages a daily high of 22.4°C with nights around 13.7°C. Expect roughly 7.7 wet days totalling 74.4mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Ŭndŏk is September.
Based on POSET, RS (40.8km), 1995–2024. 30 years of September data.