Weather in Chicago in September
In an average September, Chicago sees a daily high around 76°F and a low around 57°F, based on 1980–2026 of local climate records.
| Average high | 76°F |
|---|---|
| Typical high range | 65°F to 86°F |
| Average low | 57°F |
| Typical low range | 47°F to 68°F |
| Average daily precipitation | 0.10 in |
September records
The most extreme September on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
96°F
2013-09-10
Lowest
51°F
1995-09-22
Low
Highest
79°F
2026-09-02
Lowest
31°F
1984-09-30
Feels-like
Highest
126°F
1990-09-06
Lowest
25°F
1993-09-30
Humidity
Highest
22.1 g/m³
1985-09-07
Lowest
4.4 g/m³
1995-09-23
Wind
Highest
28 mph
1997-09-29
Lowest
3 mph
1993-09-17
Gust
Highest
58 mph
1993-09-14
Lowest
9 mph
2008-09-20
Precip
Wettest
8.71 in
2008
Driest
0.52 in
2004
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