Weather in Chicago in September
Chicago, United States averages a high of 23.1°C (73.6°F) and low of 16°C (60.8°F) in September, with 8 rain days and 9.9 hours of daily sunshine. Travel score: 83.8/100 (Excellent). The best time to visit Chicago is September.
High
23°C74°F
Low
16°C61°F
🌧️
8
rain days
☀️
9.9
hrs/day sunshine
💧
71%
humidity
84— Excellent
September in Chicago is warm and occasionally wet — excellent conditions for exploring.
What are the average temperatures in Chicago?
How much does it rain in Chicago in September?
Chicago receives an average of 74.8mm of rainfall across 8 rainy days in September. The annual total is 988.7mm.
What should I pack for Chicago in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 23°C
🧴
Sunscreen SPF 30+
10 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Light rain jacket
Some rainy days expected (8 days)
☔
Umbrella
Be prepared for occasional showers
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Data based on 1994–2024 averages · Last updated: 2024-12-31