August in Kamisu averages a daily high of 28.8°C with nights around 23.2°C. Expect roughly 7.7 wet days totalling 107.9mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Kamisu is May–October.
Based on CHOSHI, JA (24.6km), 1995–2024. 22 years of August data.