Chicago in September

Average high

23.9°C

Average low

16.7°C

Rainfall

—

— wet days

Comfort score

out of 100

September in Chicago averages a daily high of 23.9°C with nights around 16.7°C. Comfortable conditions for being outdoors all day.

Across the year, the best time to visit Chicago is May–September.

Based on CHICAGO NORTHERLY ISLAND, IL US (3.4km), 1995–2024. 19 years of September data.