September in Nishinomiya averages a daily high of 28.8°C. Expect roughly 10.4 wet days totalling 159.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Nishinomiya is April–June.
Based on KOBE, JA (10.7km), 1995–2024. 25 years of September data.