June in Ŭndŏk averages a daily high of 19.8°C with nights around 13.1°C. Expect roughly 15.2 wet days totalling 100.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Ŭndŏk is September.
Based on POSET, RS (40.8km), 1995–2024. 30 years of June data.