Illinois (Chicago)
July
Weather in Illinois for July 2026
Your guide to Illinois weather in July - trends and predictions
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So far, July 2026 in Illinois is slightly warmer than the historical average by 1 °C.
The forecast for the next days in Illinois predicts temperatures to be around 28 °C, close to the historical average.
In general, the average temperature in Illinois at the beginning of July is 26.3 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 28.7 °C by the end of July.
Illinois experiences heavy rainfall in July, with over 20 rainy days and an average total precipitation 143.6 mm.
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Temperatures
Rain 🌧️
More
8
Dry days
23
Rainy days
0
Snow days
26°/20°
Temperatures
16 km/h
Avg max wind
74 %
Avg humidity
Illinois Weather July
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What’s the Weather Like in Illinois This July?
Discover the average temperatures and weather trends across Illinois’s cities this July.
Temperatures trend during July in Illinois
See the weather trend as well as the moving average line
July weather in Illinois 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 | Sunny | 29° /20° | 0 mm | 6.6 | |
| Jul. 20 | Sunny | 30° /20° | 9.4 mm | 4.6 | |
| Jul. 21 | Patchy rain possible | 29° /21° | 3.6 mm | 8.3 | |
| Jul. 22 | Sunny | 23° /19° | 0.2 mm | 5.8 | |
| Jul. 23 | Sunny | 26° /16° | 0 mm | 7 | |
| Jul. 24 | Sunny | 26° /18° | 3.5 mm | 7 | |
| Jul. 25 | Partly cloudy | 27° /18° | 0 mm | 7 | |
| Jul. 26 | Sunny | 30° /20° | 0.1 mm | 8 | |
| Jul. 27 | Sunny | 32° /24° | 5.9 mm | 8 | |
| Jul. 28 | Sunny | 26° /21° | 0 mm | 6 | |
| Jul. 29 | Sunny | 26° /20° | 0 mm | 7 | |
| Jul. 30 | Sunny | 29° /20° | 0 mm | 7 | |
| Jul. 31 | Sunny | 31° /21° | 0 mm | 8 | |
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Important Notice
Our weather forecast for Illinois 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 Illinois forecast closer to your planned date for the most up-to-date weather information.
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Illinois in July - FAQ
What are the expected maximum and minimum temperatures in Illinois 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 Illinois during July?
Significant rainfall exceeding 143.6 mm is expected in Illinois during July, occurring over more than 23 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Illinois during July?
The average wind speed in Illinois during July is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
July rainfall patterns in Illinois
Explore the daily rainfall trends and prepare for Illinoiss July weather 💧
Typically, Illinois has 23 rainy days in July with a total of 143.6 mm of rainfall.
UV exposure in Illinois during July
Stay informed about UV levels for safe outdoor activities throughout the month of July ☀️
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Where is Illinois?Get accurate weather forecasts for Illinois, located at latitude 41.85 and longitude -87.65. Stay updated with localized weather information tailored for Illinois.
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