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May in Kosai averages a daily high of 24°C. Expect roughly 10.1 wet days totalling 215.6mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Kosai is April–June.
Based on HAMAMATSU, JA (17.9km), 1995–2024. 26 years of May data.
See all twelve months for Kosai →