DuPage County (Naperville)
September
Weather in DuPage County, Illinois for September 2027
Your guide to DuPage County weather in September - trends and predictions
In general, the average temperature in DuPage County at the beginning of September is 27.8 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 23.4 °C by the end of September.
DuPage County experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 127.8 mm.
Is September a good time to visit DuPage County? check out the best time to travel to DuPage County page.
✨ Is September a good time to visit DuPage County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
23
Dry days
7
Rainy days
0
Snow days
26°/15°
Temperatures
16 km/h
Avg max wind
68 %
Avg humidity
DuPage County Weather September
Move between months or click on a day
Temperatures trend during September in DuPage County
See the weather trend as well as the moving average line
September weather in DuPage County day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 29° /16° | 0.6 mm | 6 | |
| Sept. 2 | Sunny | 29° /17° | 0 mm | 7 | |
| Sept. 3 |  Moderate rain | 31° /17° | 12.8 mm | 7 | |
| Sept. 4 |  Mist | 30° /17° | 0 mm | 7 | |
| Sept. 5 |  Overcast | 28° /18° | 0.6 mm | 7 | |
| Sept. 6 |  Patchy rain possible | 25° /14° | 2.4 mm | 6 | |
| Sept. 7 | Sunny | 24° /11° | 0 mm | 6 | |
| Sept. 8 | Overcast | 25° /11° | 0 mm | 5 | |
| Sept. 9 |  Light rain | 25° /14° | 9.8 mm | 5 | |
| Sept. 10 | Sunny | 27° /15° | 0 mm | 6 | |
| Sept. 11 | Moderate rain | 28° /16° | 10.6 mm | 7 | |
| Sept. 12 | Mist | 27° /15° | 0 mm | 6 | |
| Sept. 13 | Mist | 24° /16° | 0.4 mm | 5 | |
| Sept. 14 | Mist | 27° /15° | 0 mm | 6.8 | |
| Sept. 15 | Light rain | 29° /17° | 3 mm | 6 | |
| Sept. 16 | Patchy rain possible | 27° /17° | 1.2 mm | 6 | |
| Sept. 17 | Light rain | 26° /16° | 4.9 mm | 5 | |
| Sept. 18 | Fog | 27° /15° | 0.9 mm | 5 | |
| Sept. 19 | Moderate rain | 25° /16° | 14.4 mm | 5 | |
| Sept. 20 |  Thundery outbreaks possible | 25° /17° | 21.8 mm | 5 | |
| Sept. 21 | Light rain | 24° /16° | 3.9 mm | 5 | |
| Sept. 22 | Thundery outbreaks possible | 22° /15° | 13.4 mm | 4 | |
| Sept. 23 | Light rain | 22° /15° | 6.8 mm | 5 | |
| Sept. 24 | Overcast | 22° /14° | 0 mm | 5 | |
| Sept. 25 | Fog | 23° /15° | 0.3 mm | 5 | |
| Sept. 26 | Light rain | 25° /13° | 7.8 mm | 5 | |
| Sept. 27 | Light rain | 23° /14° | 5.4 mm | 5 | |
| Sept. 28 | Overcast | 22° /15° | 0 mm | 5 | |
| Sept. 29 | Overcast | 24° /14° | 0 mm | 5 | |
| Sept. 30 | Light rain | 25° /16° | 6.8 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for DuPage County 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 DuPage County forecast closer to your planned date for the most up-to-date weather information.
Change Month
DuPage County in September - FAQ
What are the expected maximum and minimum temperatures in DuPage County during September?
During September, expect a variety of temperatures with highs around 26° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in DuPage County during September?
Significant rainfall exceeding 127.8 mm is expected in DuPage County during September, occurring over more than 7 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in DuPage County during September?
The average wind speed in DuPage County during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in DuPage County
Explore the daily rainfall trends and prepare for DuPage Countys September weather 💧
Typically, DuPage County has 7 rainy days in September with a total of 127.8 mm of rainfall.
UV exposure in DuPage County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in DuPage County
Select a location for an accurate weather forecast
More Locations Quick links
More DuPage County weather pages
You are here
Found a mistake?
We appreciate your attention to details. Tell us here.