June in Wheaton averages a daily high of 27°C with nights around 14.7°C. Expect roughly 11.3 wet days totalling 94mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Wheaton is May–June.
Based on CHICAGO WEST CHICAGO DUPAGE AIRPORT, IL US (12.4km), 1995–2024. 28 years of June data.