June in Arlington Heights averages a daily high of 26.6°C with nights around 15.4°C. Expect roughly 10.3 wet days totalling 101.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Arlington Heights is May–September.
Based on CHICAGO PALWAUKEE AIRPORT, IL US (7.2km), 1995–2024. 27 years of June data.