June in Hamilton averages a daily high of 28.5°C with nights around 15.9°C. Expect roughly 12.7 wet days totalling 102.8mm. 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 June data.