December in Kan’onjichō averages a daily high of 12°C. Expect roughly 7.6 wet days totalling 48.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Kan’onjichō is April–June.
Based on TADOTSU, JA (19.8km), 1995–2024. 26 years of December data.