Joliet
September
Weather in Joliet for September 2025
Your guide to Joliet weather in September - trends and predictions
In general, the average temperature in Joliet at the beginning of September is 29.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 24 °F by the end of September.
Joliet sees moderate rainfall in September, averaging 10 rainy days.
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20
Dry days
10
Rainy days
0
Snow days
27°/13°
Temperatures
17 km/h
Avg max wind
68 %
Avg humidity
Joliet in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  28° | 2  29° | 3 32° | 4 34° | 5  33° | 6  27° | 7  22° |
| 8  24° | 9 27° | 10 29° | 11 27° | 12 28° | 13 26° | 14 27° |
| 15 29° | 16  29° | 17 25° | 18 27° | 19  27° | 20 30° | 21 29° |
| 22 25° | 23 24° | 24 23° | 25 26° | 26  26° | 27 22° | 28 21° |
| 29 23° | 30 27° |
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Temperatures trend during September in Joliet
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Sunny | 28° /12° | 0 mm | 7 | |
| Sept. 2 | Mist | 29° /12° | 0 mm | 7 | |
| Sept. 3 | Fog | 32° /13° | 0 mm | 8 | |
| Sept. 4 | Mist | 34° /15° | 0 mm | 8 | |
| Sept. 5 | Cloudy | 33° /18° | 1.9 mm | 8 | |
| Sept. 6 | Patchy rain possible | 27° /15° | 2.4 mm | 6 | |
| Sept. 7 | Overcast | 22° /10° | 0 mm | 6 | |
| Sept. 8 | Partly cloudy | 24° /9° | 0 mm | 7 | |
| Sept. 9 | Mist | 27° /11° | 0 mm | 7 | |
| Sept. 10 | Partly cloudy | 29° /12° | 0 mm | 8 | |
| Sept. 11 | Light rain shower | 27° /15° | 16.6 mm | 7 | |
| Sept. 12 | Fog | 28° /13° | 0 mm | 7 | |
| Sept. 13 | Mist | 26° /13° | 0 mm | 6 | |
| Sept. 14 | Mist | 27° /12° | 0 mm | 7 | |
| Sept. 15 | Cloudy | 29° /14° | 0 mm | 7 | |
| Sept. 16 | Thundery outbreaks possible | 29° /14° | 0.3 mm | 7 | |
| Sept. 17 | Light rain shower | 25° /13° | 2.7 mm | 6 | |
| Sept. 18 | Mist | 27° /10° | 0 mm | 6 | |
| Sept. 19 | Moderate rain | 27° /12° | 2.7 mm | 6 | |
| Sept. 20 | Fog | 30° /15° | 0 mm | 7 | |
| Sept. 21 | Patchy rain possible | 29° /14° | 1.5 mm | 7 | |
| Sept. 22 | Light rain shower | 25° /16° | 14.8 mm | 6 | |
| Sept. 23 | Mist | 24° /12° | 0 mm | 5 | |
| Sept. 24 | Mist | 23° /11° | 0 mm | 6 | |
| Sept. 25 | Fog | 26° /15° | 0.1 mm | 6 | |
| Sept. 26 | Moderate or heavy rain shower | 26° /13° | 14.3 mm | 6 | |
| Sept. 27 | Light rain shower | 22° /14° | 5 mm | 5 | |
| Sept. 28 | Fog | 21° /16° | 0 mm | 5 | |
| Sept. 29 | Fog | 23° /16° | 0 mm | 6 | |
| Sept. 30 | Fog | 27° /15° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Joliet in September 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.
Joliet in September - FAQ
What are the expected maximum and minimum temperatures in Joliet during September?
Enjoy moderate daytime temperatures of up to 27° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Joliet during September?
Moderate rainfall is anticipated in Joliet during September, with a total of 93.4 mm spread over approximately 10 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Joliet during September?
The average wind speed in Joliet during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Joliet
Explore the daily rainfall trends and prepare for Joliets September weather 💧
UV exposure in Joliet during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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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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