August in Kitakyushu averages a daily high of 31.5°C. Expect roughly 10.6 wet days totalling 211mm. 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. 23 years of August data.