June in Niagara Falls averages a daily high of 25.2°C with nights around 14.1°C. Expect roughly 11.4 wet days totalling 78mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Niagara Falls is May–September.
Based on NIAGARA FALLS, NY US (7.8km), 1995–2024. 24 years of June data.