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December in Sayama averages a daily high of 12.4°C. Expect roughly 7.1 wet days totalling 58mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Sayama is April–June.
Based on OSAKA, JA (18.9km), 1995–2024. 22 years of December data.
See all twelve months for Sayama →