June in Dayton averages a daily high of 29°C with nights around 18°C. Expect roughly 12.3 wet days totalling 119.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Dayton is September–October.
Based on DAYTON MCD, OH US (2.5km), 1995–2024. 25 years of June data.