Chicago
October
Weather in Chicago for October 2025
Your guide to Chicago weather in October - trends and predictions
In general, the average temperature in Chicago at the beginning of October is 22.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 15.6 °F by the end of October.
Expect significant rainfall in Chicago during October, with an average of 17 rainy days.
Snowfall in Chicago during October is quite rare, with fewer than 2 snowy days on average.
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13
Dry days
17
Rainy days
1
Snow days
16°/10°
Temperatures
24 km/h
Avg max wind
68 %
Avg humidity
Chicago in October average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  23° | 2  24° | 3 25° | 4  24° | 5  24° | ||
| 6 21° | 7  15° | 8  17° | 9 17° | 10  17° | 11 21° | 12  17° |
| 13 16° | 14 13° | 15 11° | 16 13° | 17  17° | 18 20° | 19 17° |
| 20 19° | 21 20° | 22 16° | 23 18° | 24 20° | 25 18° | 26 17° |
| 27 19° | 28 13° | 29 17° | 30 14° | 31  11° |
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Temperatures trend during October in Chicago
See the weather trend as well as the moving average line
October weather day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Oct. 1 | Fog | 23° /15° | 0 mm | 0 cm | |
| Oct. 2 | Sunny | 24° /15° | 0 mm | 0 cm | |
| Oct. 3 | Sunny | 25° /14° | 0 mm | 0 cm | |
| Oct. 4 | Patchy rain possible | 24° /18° | 3.4 mm | 0 cm | |
| Oct. 5 | Moderate or heavy rain with thunder | 24° /16° | 20.2 mm | 0 cm | |
| Oct. 6 | Light rain shower | 21° /12° | 0.4 mm | 0 cm | |
| Oct. 7 | Cloudy | 15° /8° | 0 mm | 0 cm | |
| Oct. 8 | Light drizzle | 17° /9° | 0.3 mm | 0 cm | |
| Oct. 9 | Patchy rain possible | 17° /10° | 0.1 mm | 0 cm | |
| Oct. 10 | Partly cloudy | 17° /9° | 0 mm | 0 cm | |
| Oct. 11 | Patchy light rain | 21° /10° | 2.9 mm | 0 cm | |
| Oct. 12 | Moderate or heavy rain shower | 17° /12° | 12.5 mm | 0 cm | |
| Oct. 13 | Light rain shower | 16° /11° | 31.9 mm | 0 cm | |
| Oct. 14 | Light rain shower | 13° /10° | 16.3 mm | 0 cm | |
| Oct. 15 | Light rain shower | 11° /8° | 17.5 mm | 0 cm | |
| Oct. 16 | Patchy rain possible | 13° /7° | 0.3 mm | 0 cm | |
| Oct. 17 | Overcast | 17° /6° | 0 mm | 0 cm | |
| Oct. 18 | Overcast | 20° /7° | 0 mm | 0 cm | |
| Oct. 19 | Moderate or heavy rain with thunder | 17° /10° | 1.6 mm | 0 cm | |
| Oct. 20 | Patchy rain possible | 19° /10° | 0.5 mm | 0 cm | |
| Oct. 21 | Light rain shower | 20° /11° | 1.1 mm | 0 cm | |
| Oct. 22 | Cloudy | 16° /8° | 0 mm | 0 cm | |
| Oct. 23 | Cloudy | 18° /9° | 0 mm | 0 cm | |
| Oct. 24 | Patchy rain possible | 20° /9° | 0.5 mm | 0 cm | |
| Oct. 25 | Light rain | 18° /12° | 7.1 mm | 0 cm | |
| Oct. 26 | Patchy rain possible | 17° /13° | 1 mm | 0 cm | |
| Oct. 27 | Light drizzle | 19° /10° | 3 mm | 0 cm | |
| Oct. 28 | Overcast | 13° /6° | 0 mm | 0 cm | |
| Oct. 29 | Light rain shower | 17° /10° | 6.4 mm | 0 cm | |
| Oct. 30 | Partly cloudy | 14° /8° | 0 mm | 0 cm | |
| Oct. 31 | Moderate snow | 11° /5° | 4 mm | 0.1 cm | |
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Important Notice
Our weather forecast for Chicago in October is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Chicago forecast closer to your planned date for the most up-to-date weather information.
Chicago in October - FAQ
What are the expected maximum and minimum temperatures in Chicago during October?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Chicago during October?
Significant rainfall exceeding 165.1 mm is expected in Chicago during October, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
Is snowfall common in Chicago during October?
Chicago experiences an average snowfall of 0.1 cm during October, occurring over 1 days, which may interest winter sports enthusiasts.
What are the typical wind conditions in Chicago during October?
The average wind speed in Chicago during October is 24 km/h, suggesting breezy to windy conditions, depending on your activities.
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