Naperville (IL)
July
Weather in Naperville, Illinois for July 2026
Your guide to Naperville weather in July - trends and predictions
In general, the average temperature in Naperville at the beginning of July is 28.1 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 29.4 °F by the end of July.
Naperville experiences heavy rainfall in July, with over 20 rainy days and an average total precipitation 189.3 mm.
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Temperatures
Rain 🌧️
More
8
Dry days
23
Rainy days
0
Snow days
28°/18°
Temperatures
16 km/h
Avg max wind
75 %
Avg humidity
Naperville Weather July
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Temperatures trend during July in Naperville
See the weather trend as well as the moving average line
July weather in Naperville day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Jul. 1 |  Patchy rain possible | 27° /16° | 7.6 mm | 6 | |
| Jul. 2 |  Moderate or heavy rain shower | 26° /18° | 14.6 mm | 6 | |
| Jul. 3 |  Overcast | 30° /18° | 5.2 mm | 7 | |
| Jul. 4 | Light rain shower | 30° /19° | 4.7 mm | 7 | |
| Jul. 5 | Moderate or heavy rain shower | 30° /20° | 7.9 mm | 6 | |
| Jul. 6 | Patchy rain possible | 26° /17° | 9.9 mm | 6 | |
| Jul. 7 | Patchy rain possible | 28° /16° | 1.7 mm | 6 | |
| Jul. 8 | Moderate or heavy rain shower | 27° /17° | 10.3 mm | 6 | |
| Jul. 9 | Overcast | 28° /17° | 8.2 mm | 6 | |
| Jul. 10 |  Sunny | 28° /16° | 2.5 mm | 7 | |
| Jul. 11 | Moderate or heavy rain shower | 29° /18° | 13.8 mm | 7 | |
| Jul. 12 | Moderate or heavy rain shower | 29° /19° | 10.1 mm | 7 | |
| Jul. 13 | Patchy rain possible | 26° /18° | 1 mm | 6 | |
| Jul. 14 | Overcast | 32° /19° | 0.1 mm | 7 | |
| Jul. 15 |  Heavy rain at times | 29° /20° | 7.9 mm | 6 | |
| Jul. 16 | Overcast | 29° /19° | 31 mm | 6 | |
| Jul. 17 | Overcast | 24° /16° | 0.5 mm | 5 | |
| Jul. 18 | Overcast | 26° /14° | 0 mm | 6 | |
| Jul. 19 |  Partly cloudy | 29° /16° | 8.1 mm | 7 | |
| Jul. 20 | Overcast | 27° /18° | 0 mm | 6 | |
| Jul. 21 | Overcast | 28° /17° | 0 mm | 6 | |
| Jul. 22 | Overcast | 28° /17° | 1.1 mm | 6 | |
| Jul. 23 | Moderate rain at times | 31° /17° | 2.4 mm | 7 | |
| Jul. 24 | Overcast | 30° /19° | 0.9 mm | 6 | |
| Jul. 25 | Partly cloudy | 30° /19° | 0 mm | 7 | |
| Jul. 26 | Moderate rain at times | 29° /18° | 2.6 mm | 7 | |
| Jul. 27 | Partly cloudy | 31° /19° | 3 mm | 7 | |
| Jul. 28 | Moderate or heavy rain shower | 30° /22° | 7.2 mm | 6 | |
| Jul. 29 | Patchy rain possible | 30° /20° | 3.4 mm | 6 | |
| Jul. 30 | Partly cloudy | 29° /20° | 0.8 mm | 7 | |
| Jul. 31 | Overcast | 27° /17° | 22.8 mm | 6 | |
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Important Notice
Our weather forecast for Naperville 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 Naperville forecast closer to your planned date for the most up-to-date weather information.
Change Month
Naperville in July - FAQ
What are the expected maximum and minimum temperatures in Naperville during July?
During July, expect a variety of temperatures with highs around 28° and lows near 18°, suitable for diverse activities and preferences.
How much rainfall should be expected in Naperville during July?
Significant rainfall exceeding 189.3 mm is expected in Naperville during July, occurring over more than 23 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Naperville during July?
The average wind speed in Naperville during July is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
July rainfall patterns in Naperville
Explore the daily rainfall trends and prepare for Napervilles July weather 💧
UV exposure in Naperville during July
Stay informed about UV levels for safe outdoor activities throughout the month of July ☀️
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