September in Higashi-Matsuyama averages a daily high of 28.1°C. Expect roughly 12.4 wet days totalling 192.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Higashi-Matsuyama is April–May.
Based on KUMAGAYA, JA (13.3km), 1995–2024. 25 years of September data.