Illinois
July
Weather in Illinois for July 2025
Your guide to Illinois weather in July - trends and predictions
In general, the average temperature in Illinois at the beginning of July is 24.6 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 27.1 °F by the end of July.
Expect significant rainfall in Illinois during July, with an average of 16 rainy days.
- New! Chat with our AI weatherman - it’s amazing and free.
15
Dry days
16
Rainy days
0
Snow days
26°/18°
Temperatures
16 km/h
Avg max wind
73 %
Avg humidity
Illinois in July average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  23° | 2  24° | 3  26° | 4  26° | 5 26° | 6 21° | |
| 7 26° | 8 23° | 9 24° | 10 26° | 11 26° | 12 24° | 13 26° |
| 14 30° | 15 28° | 16 27° | 17 23° | 18 22° | 19 25° | 20 27° |
| 21 24° | 22 26° | 23  27° | 24 25° | 25  26° | 26 28° | 27  28° |
| 28 27° | 29 26° | 30 27° | 31 28° |
You can click on date
Access Illinois weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during July in Illinois
See the weather trend as well as the moving average line
July weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Jul. 1 | Patchy rain possible | 23° /17° | 0.7 mm | 6 | |
| Jul. 2 | Moderate or heavy rain shower | 24° /17° | 17.1 mm | 6 | |
| Jul. 3 | Cloudy | 26° /17° | 3.8 mm | 6 | |
| Jul. 4 | Overcast | 26° /18° | 1.7 mm | 6 | |
| Jul. 5 | Moderate or heavy rain shower | 26° /19° | 7.9 mm | 6 | |
| Jul. 6 | Patchy rain possible | 21° /16° | 1.2 mm | 5 | |
| Jul. 7 | Patchy rain possible | 26° /17° | 2.6 mm | 6 | |
| Jul. 8 | Moderate or heavy rain shower | 23° /18° | 5.4 mm | 6 | |
| Jul. 9 | Overcast | 24° /18° | 0 mm | 6 | |
| Jul. 10 | Overcast | 26° /18° | 1.7 mm | 6 | |
| Jul. 11 | Moderate or heavy rain shower | 26° /18° | 6.5 mm | 6 | |
| Jul. 12 | Moderate or heavy rain shower | 24° /17° | 9.9 mm | 6 | |
| Jul. 13 | Overcast | 26° /18° | 2 mm | 6 | |
| Jul. 14 | Overcast | 30° /20° | 0.9 mm | 7 | |
| Jul. 15 | Moderate or heavy rain shower | 28° /21° | 10.3 mm | 6 | |
| Jul. 16 | Overcast | 27° /20° | 4.4 mm | 6 | |
| Jul. 17 | Overcast | 23° /18° | 0.8 mm | 6 | |
| Jul. 18 | Overcast | 22° /17° | 0 mm | 5 | |
| Jul. 19 | Overcast | 25° /16° | 0 mm | 6 | |
| Jul. 20 | Patchy rain possible | 27° /19° | 0.2 mm | 6 | |
| Jul. 21 | Overcast | 24° /19° | 0.2 mm | 5 | |
| Jul. 22 | Cloudy | 26° /19° | 0.1 mm | 6 | |
| Jul. 23 | Heavy rain at times | 27° /19° | 4.4 mm | 6 | |
| Jul. 24 | Overcast | 25° /20° | 0.3 mm | 6 | |
| Jul. 25 | Partly cloudy | 26° /19° | 0 mm | 7 | |
| Jul. 26 | Moderate rain at times | 28° /20° | 1.5 mm | 7 | |
| Jul. 27 | Sunny | 28° /19° | 0 mm | 7 | |
| Jul. 28 | Moderate rain at times | 27° /21° | 12.5 mm | 6 | |
| Jul. 29 | Overcast | 26° /20° | 4.6 mm | 6 | |
| Jul. 30 | Cloudy | 27° /21° | 0.4 mm | 6 | |
| Jul. 31 | Partly cloudy | 28° /20° | 3.4 mm | 7 | |
| Next | |||||
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.
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 18°, suitable for diverse activities and preferences.
How much rainfall should be expected in Illinois during July?
Significant rainfall exceeding 117.7 mm is expected in Illinois during July, occurring over more than 16 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.
Provinces in Illinois
Select a province for an accurate weather forecast
Top locations in Illinois
Select a location for an accurate weather forecast
More Locations Quick links
You are here
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.
Found a mistake?
We appreciate your attention to details. Tell us here.