Weather in Chicago, Illinois, United States in October
In an average October, Chicago sees a daily high around 59°F and a low around 49°F, based on 1981–2026 of local climate records.
| Average high | 59°F |
|---|---|
| Typical high range | 50°F to 69°F |
| Average low | 49°F |
| Typical low range | 41°F to 56°F |
| Average daily precipitation | 0.10 in |
October records
The most extreme October on record for each metric, across 1981–2026. For rainfall, the wettest and driest are by total October accumulation.
High
Highest
83°F
2025-10-03
Lowest
39°F
1988-10-30
Low
Highest
69°F
2007-10-07
Lowest
30°F
1981-10-24
Feels-like
Highest
87°F
2025-10-03
Lowest
17°F
1996-10-31
Humidity
Highest
17.6 g/m³
2019-10-01
Lowest
3.4 g/m³
1988-10-29
Wind
Highest
39 mph
2021-10-25
Lowest
5 mph
1988-10-06
Precip
Wettest
8.69 in
2017
Driest
1.28 in
2005
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