August in Cheongju-si averages a daily high of 30.2°C. Expect roughly 16.3 wet days totalling 427.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Cheongju-si is September–October.
Based on TAEJON, KS (38.3km), 1995–2024. 18 years of August data.