September weather in Chicago, United States
Averages from 150 days in September across 2020–2024.
Typical conditions
| Average high | 23.8°C |
|---|---|
| Average low | 15.8°C |
| Average mean | 19.6°C |
| Total precipitation | 491.2 mm |
| Rainy days | 71 |
| Average precipitation hours | 2.9 h |
| Average max wind speed | 23.6 km/h |
| Average sunshine | 9.6 h/day |
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