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September in Ōshū averages a daily high of 24.5°C. Expect roughly 11.8 wet days totalling 183mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Ōshū is May–June.
Based on OFUNATO, JA (48km), 1995–2024. 24 years of September data.
See all twelve months for Ōshū →