April in Wheaton averages a daily high of 15.6°C with nights around 3.2°C. Expect roughly 11.7 wet days totalling 86.9mm. Generally workable, with some weather to plan around.
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. 27 years of April data.