September in Honmachi averages a daily high of 29.5°C. Expect roughly 13.3 wet days totalling 273.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Honmachi is April–May.
Based on HITOYOSHI, JA (34.9km), 1995–2024. 26 years of September data.