Cook County (Chicago)
July
Weather in Cook County, Illinois for July 2026
Your guide to Cook County weather in July - trends and predictions
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So far, July 2026 in Cook County is slightly warmer than the historical average by 1.2 °C.
The forecast for the next days in Cook County predicts temperatures to be around 28 °C, close to the historical average.
In general, the average temperature in Cook County at the beginning of July is 26.3 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 28.6 °C by the end of July.
Cook County experiences heavy rainfall in July, with over 20 rainy days and an average total precipitation 143.6 mm.
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Temperatures
Rain 🌧️
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8
Dry days
23
Rainy days
0
Snow days
26°/20°
Temperatures
16 km/h
Avg max wind
74 %
Avg humidity
Cook County Weather July
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Temperatures trend during July in Cook County
See the weather trend as well as the moving average line
July weather in Cook County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Jul. 1 |  Patchy rain possible | 26° /18° | 12.9 mm | 7 | |
| Jul. 2 |  Moderate or heavy rain shower | 25° /18° | 6.4 mm | 7 | |
| Jul. 3 |  Partly cloudy | 27° /18° | 4.2 mm | 7 | |
| Jul. 4 | Light rain shower | 28° /20° | 5.6 mm | 7 | |
| Jul. 5 | Moderate or heavy rain shower | 28° /20° | 4.4 mm | 7 | |
| Jul. 6 | Moderate or heavy rain shower | 24° /18° | 17.3 mm | 7 | |
| Jul. 7 |  Overcast | 26° /18° | 1 mm | 7 | |
| Jul. 8 | Moderate or heavy rain shower | 25° /18° | 4.2 mm | 7 | |
| Jul. 9 | Partly cloudy | 25° /18° | 2.5 mm | 7 | |
| Jul. 10 | Overcast | 25° /18° | 1.5 mm | 7 | |
| Jul. 11 | Moderate or heavy rain shower | 27° /18° | 10.4 mm | 7 | |
| Jul. 12 |  Sunny | 26° /19° | 3.5 mm | 7 | |
| Jul. 13 | Overcast | 26° /19° | 1 mm | 6 | |
| Jul. 14 | Overcast | 29° /20° | 0.6 mm | 7 | |
| Jul. 15 | Moderate or heavy rain shower | 27° /21° | 9.5 mm | 7 | |
| Jul. 16 | Overcast | 27° /20° | 7.1 mm | 7 | |
| Jul. 17 | Overcast | 25° /19° | 4.2 mm | 6 | |
| Jul. 18 | Overcast | 25° /18° | 1.4 mm | 7 | |
| Jul. 19 | Partly cloudy | 27° /19° | 0.7 mm | 8 | |
| Jul. 20 |  Smoky haze | 34° /18° | 0.8 mm | 6.5 | |
| Jul. 21 | Sunny | 30° /20° | 2.9 mm | 8.6 | |
| Jul. 22 | Sunny | 24° /17° | 0.2 mm | 9.1 | |
| Jul. 23 | Sunny | 27° /17° | 0 mm | 9 | |
| Jul. 24 | Sunny | 26° /19° | 0 mm | 7 | |
| Jul. 25 | Sunny | 28° /18° | 0 mm | 7 | |
| Jul. 26 | Sunny | 30° /21° | 0 mm | 7 | |
| Jul. 27 | Sunny | 30° /22° | 0 mm | 7 | |
| Jul. 28 | Sunny | 33° /23° | 0.5 mm | 8 | |
| Jul. 29 | Sunny | 29° /24° | 0.1 mm | 7 | |
| Jul. 30 | Sunny | 26° /22° | 1.2 mm | 7 | |
| Jul. 31 | Sunny | 24° /19° | 1.5 mm | 6 | |
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Important Notice
Our weather forecast for Cook County in July 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 July - FAQ
What are the expected maximum and minimum temperatures in Cook County during July?
During July, 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 July?
Significant rainfall exceeding 143.6 mm is expected in Cook County during July, occurring over more than 23 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Cook County during July?
The average wind speed in Cook County during July is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
July rainfall patterns in Cook County
Explore the daily rainfall trends and prepare for Cook Countys July weather 💧
Typically, Cook County has 23 rainy days in July with a total of 143.6 mm of rainfall.
UV exposure in Cook County during July
Stay informed about UV levels for safe outdoor activities throughout the month of July ☀️
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Where is Cook County?Get accurate weather forecasts for Cook County, located at latitude 41.85 and longitude -87.65. Stay updated with localized weather information tailored for Cook County.
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