January in Cheongju-si averages a daily high of 3.9°C. Expect roughly 4 wet days totalling 3.2mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Cheongju-si is September–October.
Based on TAEJON, KS (38.3km), 1995–2024. 20 years of January data.