August in Gapyeong averages a daily high of 30°C. Expect roughly 16.3 wet days totalling 459.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Gapyeong is September–October.
Based on CHUNCHEON, KS (21km), 1995–2024. 22 years of August data.