January in Nakatsu averages a daily high of 9.9°C. Expect roughly 9.1 wet days totalling 57.8mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Nakatsu is April–May.
Based on HITA, JA (39.2km), 1995–2024. 29 years of January data.