June in Kingston averages a daily high of 23.7°C with nights around 12.6°C. Expect roughly 13.4 wet days totalling 97.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Kingston is May–September.
Based on HARTINGTON IHD, ON CA (27.8km), 1995–2024. 28 years of June data.