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May in Iwaki averages a daily high of 20.2°C. Expect roughly 11.3 wet days totalling 144.1mm. 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. 19 years of May data.
See all twelve months for Iwaki →