December in Kokubu-matsuki averages a daily high of 15.5°C. Expect roughly 10.3 wet days totalling 109.6mm. 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 December data.