December in Kitakyushu averages a daily high of 12.5°C. Expect roughly 10.4 wet days totalling 72.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Kitakyushu is May.
Based on SHIMONOSEKI, JA (13.3km), 1995–2024. 21 years of December data.