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January in Kōshi averages a daily high of 10.7°C. Expect roughly 6.5 wet days totalling 54.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Kōshi is April–May.
Based on KUMAMOTO, JA (11.1km), 1995–2024. 29 years of January data.
See all twelve months for Kōshi →