Naperville (IL)
August
Weather in Naperville, Illinois for August 2026
Your guide to Naperville weather in August - trends and predictions
In general, the average temperature in Naperville at the beginning of August is 27.9 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 27.1 °C by the end of August.
Naperville in August brings notable rainfall, with an average of 17 rainy days and a total precipitation of 112.2 mm.
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Temperatures
Rain 🌧️
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14
Dry days
17
Rainy days
0
Snow days
27°/17°
Temperatures
17 km/h
Avg max wind
72 %
Avg humidity
Naperville Weather August
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Temperatures trend during August in Naperville
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August weather in Naperville day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Patchy rain possible | 29° /18° | 2.8 mm | 6 | |
| Aug. 2 |  Cloudy | 28° /17° | 0 mm | 6 | |
| Aug. 3 |  Overcast | 29° /19° | 1.1 mm | 7 | |
| Aug. 4 |  Moderate rain at times | 29° /17° | 0.3 mm | 7 | |
| Aug. 5 | Moderate or heavy rain shower | 28° /19° | 3.1 mm | 6 | |
| Aug. 6 | Patchy rain possible | 26° /18° | 3.2 mm | 6 | |
| Aug. 7 | Moderate rain at times | 26° /18° | 2.3 mm | 6 | |
| Aug. 8 | Patchy rain possible | 28° /18° | 3.6 mm | 6 | |
| Aug. 9 | Overcast | 28° /16° | 0 mm | 7 | |
| Aug. 10 | Patchy rain possible | 25° /16° | 13 mm | 6 | |
| Aug. 11 | Patchy rain possible | 28° /17° | 3.8 mm | 6 | |
| Aug. 12 | Patchy rain possible | 27° /18° | 34.3 mm | 6 | |
| Aug. 13 | Moderate rain at times | 28° /17° | 0.5 mm | 7 | |
| Aug. 14 | Moderate or heavy rain shower | 27° /16° | 6.5 mm | 6 | |
| Aug. 15 | Patchy rain possible | 26° /17° | 3.9 mm | 6 | |
| Aug. 16 | Overcast | 30° /18° | 7.9 mm | 6 | |
| Aug. 17 | Moderate or heavy rain shower | 25° /18° | 16.8 mm | 6 | |
| Aug. 18 |  Sunny | 26° /16° | 0 mm | 6 | |
| Aug. 19 |  Partly cloudy | 28° /17° | 0 mm | 6 | |
| Aug. 20 | Sunny | 29° /17° | 0 mm | 7 | |
| Aug. 21 | Cloudy | 26° /17° | 0 mm | 6 | |
| Aug. 22 | Overcast | 28° /16° | 0 mm | 6 | |
| Aug. 23 | Overcast | 32° /17° | 0 mm | 7 | |
| Aug. 24 | Partly cloudy | 30° /17° | 0 mm | 7 | |
| Aug. 25 | Patchy rain possible | 27° /17° | 3.8 mm | 6 | |
| Aug. 26 | Overcast | 28° /15° | 0.4 mm | 6 | |
| Aug. 27 | Partly cloudy | 28° /16° | 0 mm | 6 | |
| Aug. 28 |  Mist | 27° /16° | 2 mm | 6 | |
| Aug. 29 | Light rain shower | 28° /15° | 1.3 mm | 6 | |
| Aug. 30 | Overcast | 26° /16° | 1.5 mm | 6 | |
| Aug. 31 | Mist | 26° /16° | 0.1 mm | 6 | |
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Important Notice
Our weather forecast for Naperville 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 Naperville forecast closer to your planned date for the most up-to-date weather information.
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Naperville in August - FAQ
What are the expected maximum and minimum temperatures in Naperville during August?
During August, expect a variety of temperatures with highs around 27° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in Naperville during August?
Significant rainfall exceeding 112.2 mm is expected in Naperville during August, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Naperville during August?
The average wind speed in Naperville during August is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in Naperville
Explore the daily rainfall trends and prepare for Napervilles August weather 💧
Typically, Naperville has 17 rainy days in August with a total of 112.2 mm of rainfall.
UV exposure in Naperville during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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