Chicago Weather in September
23.9°C high · 12.8°C low · 91 mm rain · 6.8h sun
Yes — Sep is one of the best months to visit Chicago, with mild weather and 6.8h of daily sunshine.
September at a glance
| Metric | Value |
|---|---|
| Average high | 23.9°C |
| Average low | 12.8°C |
| Rainfall | 91 mm |
| Sunshine | 6.8 hours/day |
| Daylight | 12.3 hours |
What to pack in September
Pack comfortable clothes with a light layer for evenings, plus a raincoat and umbrella for Chicago in September.
Chicago weather by month
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Frequently asked questions
What is the weather in Chicago in September?
Highs of 23.9°C and lows of 12.8°C, with about 91 mm of rain and 6.8 hours of sunshine per day.
Is September a good time to visit Chicago?
Yes — Sep is one of the best months to visit Chicago, with mild weather and 6.8h of daily sunshine.
What to do in Chicago · Best time to visit Chicago
Climate data: Open-Meteo Historical (ERA5), 1991–2020. CC BY 4.0.