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January in Saku averages a daily high of 2.4°C. Expect roughly 6 wet days totalling 23.7mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Saku is May–September.
Based on KARUIZAWA, JA (16km), 1995–2024. 28 years of January data.
See all twelve months for Saku →