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September in Iwaki averages a daily high of 25.5°C. Expect roughly 11.7 wet days totalling 174.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Iwaki is May–November.
Based on ONAHAMA, JA (11.2km), 1995–2024. 25 years of September data.
See all twelve months for Iwaki →