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December in Iwaki averages a daily high of 11.2°C. Expect roughly 5.9 wet days totalling 63.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Iwaki is May–November.
Based on ONAHAMA, JA (11.2km), 1995–2024. 26 years of December data.
See all twelve months for Iwaki →