August in Hamilton averages a daily high of 30°C with nights around 16.9°C. Expect roughly 10.4 wet days totalling 68.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Hamilton is September–October.
Based on HAMILTON BUTLER CO REGIONAL AIRPORT, OH US (5.5km), 1995–2024. 27 years of August data.