Weather in Chicago, Illinois, United States in September
In an average September, Chicago sees a daily high around 71°F and a low around 61°F, based on 1981–2026 of local climate records.
| Average high | 71°F |
|---|---|
| Typical high range | 62°F to 79°F |
| Average low | 61°F |
| Typical low range | 54°F to 67°F |
| Average daily precipitation | 0.10 in |
September records
The most extreme September on record for each metric, across 1981–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
87°F
2011-09-01
Lowest
50°F
1984-09-26
Low
Highest
76°F
2011-09-02
Lowest
41°F
1985-09-24
Feels-like
Highest
101°F
2011-09-01
Lowest
32°F
1985-09-24
Humidity
Highest
21.0 g/m³
2016-09-07
Lowest
4.8 g/m³
1984-09-30
Wind
Highest
36 mph
1989-09-22
Lowest
5 mph
2002-09-09
Precip
Wettest
11.16 in
2008
Driest
0.57 in
2004
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