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December in Jōsō averages a daily high of 12.5°C. Expect roughly 6.2 wet days totalling 60.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Jōsō is April–June.
Based on TOKYO, JA (42.9km), 1995–2024. 22 years of December data.
See all twelve months for Jōsō →