January in Kokubu-matsuki averages a daily high of 12.9°C. Expect roughly 10.6 wet days totalling 75.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Kokubu-matsuki is April–May.
Based on KAGOSHIMA, JA (28.9km), 1995–2024. 22 years of January data.