August in Kangsŏn averages a daily high of 29.5°C with nights around 20.9°C. Expect roughly 13 wet days totalling 124.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Kangsŏn is April–May.
Based on PYONGYANG INTERNATIONAL, KN (32.9km), 1995–2024. 19 years of August data.