May in Belmont Cragin averages a daily high of 21.3°C with nights around 9.9°C. Expect roughly 12.8 wet days totalling 115.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Belmont Cragin is August–September.
Based on CHICAGO OHARE INTERNATIONAL AIRPORT, IL US (13.9km), 1995–2024. 30 years of May data.