Typical Weather in Chicago, IL in September
75° F Avg High
62° F Avg Low
0 Rainy Days
☀️ Temperature Summary
September is a popular time of year to visit, with an inviting climate characterized by warm temperatures. September is one of the warmer months of the year for Chicago, with highs averaging around 75°F. You can expect overnight lows near 62°F most days. Daily high temperatures can range between 79°F and 68°F for the month of September.
The warm, dry temperatures in September make Chicago a great destination to relax and soak up the sun.
High Temps Throughout the Year
🎒 What to Pack
Pick up a few of these items to keep your trip fun and comfortable.
☔ Rain Summary
In September you can expect close to a 0% chance of rain for any given day. It rains more than usual in September, with total rainfall for the month typically near NaN inches.
Rainfall Throughout the Year
Planning a trip to Chicago? Try our free trip weather planner