September in Shikokuchūō averages a daily high of 28.9°C. Expect roughly 9.9 wet days totalling 181.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Shikokuchūō is April–June.
Based on TADOTSU, JA (38.9km), 1995–2024. 27 years of September data.