Cook County (Chicago)
August
Weather in Cook County, Illinois for August 2027
Your guide to Cook County weather in August - trends and predictions
In general, the average temperature in Cook County at the beginning of August is 26 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 26.1 °C by the end of August.
The climate of Cook County in August is notably wet, with an average of 12 rainy days, and a total of 152.5 mm of precipitation.
Is August a good time to visit Cook County? check out the best time to travel to Cook County page.
✨ Is August a good time to visit Cook County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
19
Dry days
12
Rainy days
0
Snow days
26°/20°
Temperatures
18 km/h
Avg max wind
73 %
Avg humidity
Cook County Weather August
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Temperatures trend during August in Cook County
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August weather in Cook County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Moderate rain | 26° /20° | 15.1 mm | 6 | |
| Aug. 2 |  Cloudy | 26° /20° | 0.8 mm | 7 | |
| Aug. 3 |  Patchy rain possible | 27° /20° | 1.6 mm | 7 | |
| Aug. 4 | Patchy rain possible | 26° /20° | 0.2 mm | 7 | |
| Aug. 5 |  Light rain | 26° /20° | 2.8 mm | 6 | |
| Aug. 6 |  Moderate or heavy rain shower | 25° /20° | 6 mm | 6 | |
| Aug. 7 | Light rain | 27° /20° | 4 mm | 7 | |
| Aug. 8 | Light rain | 27° /21° | 3 mm | 7 | |
| Aug. 9 | Moderate or heavy rain shower | 26° /20° | 5.6 mm | 7 | |
| Aug. 10 | Light rain | 27° /19° | 3.9 mm | 6 | |
| Aug. 11 | Light rain | 27° /21° | 8.2 mm | 6 | |
| Aug. 12 | Moderate rain | 26° /21° | 21.5 mm | 7 | |
| Aug. 13 | Light rain | 25° /20° | 5.9 mm | 7 | |
| Aug. 14 | Light rain | 25° /20° | 5 mm | 7 | |
| Aug. 15 | Light rain | 24° /19° | 6.1 mm | 5 | |
| Aug. 16 | Light rain | 27° /20° | 8.1 mm | 6 | |
| Aug. 17 | Moderate rain | 25° /20° | 11.7 mm | 7 | |
| Aug. 18 | Patchy rain possible | 25° /19° | 1.2 mm | 6 | |
| Aug. 19 | Patchy rain possible | 26° /20° | 0.3 mm | 6 | |
| Aug. 20 | Light rain | 26° /20° | 2.7 mm | 7 | |
| Aug. 21 |  Overcast | 25° /19° | 0.8 mm | 6 | |
| Aug. 22 |  Sunny | 25° /19° | 0.2 mm | 7 | |
| Aug. 23 | Sunny | 28° /19° | 0 mm | 7 | |
| Aug. 24 |  Partly cloudy | 28° /19° | 0.2 mm | 7 | |
| Aug. 25 | Light rain | 26° /19° | 3.4 mm | 6 | |
| Aug. 26 | Patchy rain possible | 26° /19° | 1 mm | 6 | |
| Aug. 27 | Patchy rain possible | 27° /20° | 0.1 mm | 7 | |
| Aug. 28 | Light rain | 26° /20° | 4.8 mm | 7 | |
| Aug. 29 | Patchy rain possible | 26° /20° | 2.2 mm | 6 | |
| Aug. 30 |  Heavy rain | 25° /20° | 26.1 mm | 5 | |
| Aug. 31 | Partly cloudy | 26° /19° | 0.2 mm | 6 | |
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Important Notice
Our weather forecast for Cook County in August 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 Cook County forecast closer to your planned date for the most up-to-date weather information.
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Cook County in August - FAQ
What are the expected maximum and minimum temperatures in Cook County during August?
During August, expect a variety of temperatures with highs around 26° and lows near 20°, suitable for diverse activities and preferences.
How much rainfall should be expected in Cook County during August?
Significant rainfall exceeding 152.5 mm is expected in Cook County during August, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Cook County during August?
The average wind speed in Cook County during August is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in Cook County
Explore the daily rainfall trends and prepare for Cook Countys August weather 💧
Typically, Cook County has 12 rainy days in August with a total of 152.5 mm of rainfall.
UV exposure in Cook County during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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