Joliet (IL)
August
Weather in Joliet, Illinois for August 2026
Your guide to Joliet weather in August - trends and predictions
In general, the average temperature in Joliet at the beginning of August is 27.7 °F. As the month progressed, temperatures tended to slightly decrease, reaching an average of 27.6 °F by the end of August.
The climate of Joliet in August is notably wet, with an average of 15 rainy days, and a total of 81.8 mm of precipitation.
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Temperatures
Rain 🌧️
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16
Dry days
15
Rainy days
0
Snow days
28°/16°
Temperatures
18 km/h
Avg max wind
73 %
Avg humidity
Joliet Weather August
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Temperatures trend during August in Joliet
See the weather trend as well as the moving average line
August weather in Joliet day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Patchy rain possible | 29° /17° | 1.6 mm | 7 | |
| Aug. 2 |  Fog | 27° /16° | 0.1 mm | 6 | |
| Aug. 3 |  Overcast | 30° /17° | 1.5 mm | 6 | |
| Aug. 4 | Patchy rain possible | 29° /16° | 0.2 mm | 7 | |
| Aug. 5 |  Moderate or heavy rain shower | 27° /19° | 8.2 mm | 6 | |
| Aug. 6 | Patchy rain possible | 26° /17° | 1.4 mm | 6 | |
| Aug. 7 | Moderate rain at times | 26° /17° | 2.2 mm | 6 | |
| Aug. 8 | Patchy rain possible | 28° /17° | 3.6 mm | 6 | |
| Aug. 9 | Patchy rain possible | 28° /16° | 0.9 mm | 6 | |
| Aug. 10 | Patchy rain possible | 25° /15° | 10.1 mm | 6 | |
| Aug. 11 | Patchy rain possible | 28° /17° | 8.4 mm | 6 | |
| Aug. 12 |  Cloudy | 27° /18° | 12.7 mm | 6 | |
| Aug. 13 | Patchy rain possible | 28° /16° | 0.3 mm | 7 | |
| Aug. 14 | Moderate or heavy rain shower | 27° /15° | 6.6 mm | 6 | |
| Aug. 15 | Patchy rain possible | 27° /16° | 3.5 mm | 6 | |
| Aug. 16 | Overcast | 31° /17° | 4.8 mm | 7 | |
| Aug. 17 | Moderate or heavy rain shower | 26° /18° | 6.6 mm | 6 | |
| Aug. 18 |  Sunny | 26° /16° | 1.3 mm | 6 | |
| Aug. 19 | Sunny | 27° /17° | 0 mm | 6 | |
| Aug. 20 | Sunny | 29° /17° | 0 mm | 7 | |
| Aug. 21 | Cloudy | 26° /15° | 0 mm | 6 | |
| Aug. 22 | Overcast | 28° /16° | 0 mm | 6 | |
| Aug. 23 | Overcast | 32° /16° | 0 mm | 7 | |
| Aug. 24 | Cloudy | 31° /16° | 0 mm | 6 | |
| Aug. 25 | Patchy rain possible | 28° /15° | 3 mm | 6 | |
| Aug. 26 | Fog | 28° /13° | 0.3 mm | 6 | |
| Aug. 27 | Mist | 28° /15° | 0 mm | 6 | |
| Aug. 28 | Fog | 27° /14° | 2 mm | 6 | |
| Aug. 29 | Light rain shower | 29° /14° | 0.6 mm | 6 | |
| Aug. 30 | Overcast | 27° /15° | 2.8 mm | 6 | |
| Aug. 31 | Fog | 26° /13° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Joliet 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 Joliet forecast closer to your planned date for the most up-to-date weather information.
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Joliet in August - FAQ
What are the expected maximum and minimum temperatures in Joliet during August?
During August, expect a variety of temperatures with highs around 28° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Joliet during August?
Moderate rainfall is anticipated in Joliet during August, with a total of 81.8 mm spread over approximately 15 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Joliet during August?
The average wind speed in Joliet during August is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in Joliet
Explore the daily rainfall trends and prepare for Joliets August weather 💧
UV exposure in Joliet during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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Where is Joliet?Get accurate weather forecasts for Joliet, located at latitude 41.525 and longitude -88.083. Stay updated with localized weather information tailored for Joliet.
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