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 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 27.1 °F by the end of August.
The climate of Naperville in August is notably wet, with an average of 15 rainy days, and a total of 68.5 mm of precipitation.
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Temperatures
Rain 🌧️
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16
Dry days
15
Rainy days
0
Snow days
27°/17°
Temperatures
17 km/h
Avg max wind
70 %
Avg humidity
Naperville Weather August
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Temperatures trend during August in Naperville
See the weather trend as well as the moving average line
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?
Moderate rainfall is anticipated in Naperville during August, with a total of 68.5 mm spread over approximately 15 days. Considering plans for rainy days is advisable.
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 💧
UV exposure in Naperville during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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