July in Hamilton averages a daily high of 30.3°C with nights around 18.1°C. Expect roughly 12.6 wet days totalling 95.1mm. 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. 28 years of July data.