September in Miyazaki averages a daily high of 29.1°C. Expect roughly 14.5 wet days totalling 350.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Miyazaki is April–May.
Based on MIYAZAKI, JA (1.8km), 1995–2024. 21 years of September data.