Weather · Chicago, United States
Chicago Weather in September
Chicago in September runs 24°C / 16°C with 103mm of rain, one of the best months to visit.
Avg high
24°C
75°F
Avg low
16°C
61°F
Rainfall
103mm
#5 wettest of 12
What to pack
Summer clothes by day; a light layer for evenings. Bring a compact umbrella for the odd shower.
Timing a trip around the weather? A Local Friend in Chicago builds it around the season for you.