Peoria County (Peoria)
September
Weather in Peoria County for September 2025
Your guide to Peoria County weather in September - trends and predictions
In general, the average temperature in Peoria County at the beginning of September is 25.7 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 23.1 °F by the end of September.
With an average of 3 rainy days, Peoria County experiences minimal rainfall in September.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
27
Dry days
3
Rainy days
0
Snow days
27°/14°
Temperatures
19 km/h
Avg max wind
60 %
Avg humidity
Peoria County in September average weather
Move between months or click on a day
| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  26° | 2 24° | 3  26° | 4 29° | 5  32° | 6 23° | |
| 7 20° | 8 24° | 9 29° | 10 31° | 11 33° | 12 33° | 13  25° |
| 14  31° | 15  32° | 16 33° | 17 29° | 18 29° | 19 30° | 20  31° |
| 21 30° | 22  20° | 23 24° | 24  20° | 25 24° | 26 25° | 27 22° |
| 28 21° | 29 25° | 30 25° |
You can click on date
Access Peoria County weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during September in Peoria County
See the weather trend as well as the moving average line
September weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Sunny | 26° /15° | 0 mm | 7 | |
| Sept. 2 | Sunny | 24° /12° | 0 mm | 6 | |
| Sept. 3 | Partly cloudy | 26° /11° | 0 mm | 7 | |
| Sept. 4 | Sunny | 29° /12° | 0 mm | 7 | |
| Sept. 5 | Mist | 32° /17° | 0 mm | 7 | |
| Sept. 6 | Partly cloudy | 23° /13° | 0.1 mm | 6 | |
| Sept. 7 | Sunny | 20° /6° | 0 mm | 6 | |
| Sept. 8 | Sunny | 24° /6° | 0 mm | 6 | |
| Sept. 9 | Sunny | 29° /11° | 0 mm | 7 | |
| Sept. 10 | Sunny | 31° /13° | 0 mm | 8 | |
| Sept. 11 | Sunny | 33° /15° | 0 mm | 8 | |
| Sept. 12 | Sunny | 33° /17° | 0 mm | 8 | |
| Sept. 13 | Overcast | 25° /17° | 0 mm | 6 | |
| Sept. 14 | Patchy rain possible | 31° /17° | 0.1 mm | 7 | |
| Sept. 15 | Cloudy | 32° /19° | 0 mm | 7 | |
| Sept. 16 | Sunny | 33° /18° | 0 mm | 8 | |
| Sept. 17 | Sunny | 29° /14° | 0 mm | 7 | |
| Sept. 18 | Sunny | 29° /13° | 0 mm | 7 | |
| Sept. 19 | Partly cloudy | 30° /15° | 0 mm | 8 | |
| Sept. 20 | Heavy rain at times | 31° /18° | 5.5 mm | 7 | |
| Sept. 21 | Overcast | 30° /17° | 0 mm | 7 | |
| Sept. 22 | Moderate rain | 20° /17° | 31 mm | 5 | |
| Sept. 23 | Fog | 24° /11° | 0 mm | 5 | |
| Sept. 24 | Moderate or heavy rain shower | 20° /14° | 13.8 mm | 5 | |
| Sept. 25 | Sunny | 24° /9° | 0 mm | 6 | |
| Sept. 26 | Cloudy | 25° /12° | 0 mm | 6 | |
| Sept. 27 | Overcast | 22° /13° | 0 mm | 5 | |
| Sept. 28 | Overcast | 21° /18° | 0 mm | 5 | |
| Sept. 29 | Cloudy | 25° /17° | 0 mm | 6 | |
| Sept. 30 | Fog | 25° /16° | 0 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Peoria 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 Peoria County forecast closer to your planned date for the most up-to-date weather information.
Peoria County in September - FAQ
What are the expected maximum and minimum temperatures in Peoria County during September?
Enjoy moderate daytime temperatures of up to 27° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Peoria County during September?
Moderate rainfall is anticipated in Peoria County during September, with a total of 50.4 mm spread over approximately 3 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Peoria County during September?
The average wind speed in Peoria County during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Peoria County
Explore the daily rainfall trends and prepare for Peoria Countys September weather 💧
UV exposure in Peoria County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Peoria County
Select a location for an accurate weather forecast
More Locations Quick links
You are here
Where is Peoria County?Get accurate weather forecasts for Peoria County, located at latitude 40.694 and longitude -89.589. Stay updated with localized weather information tailored for Peoria County.
Found a mistake?
We appreciate your attention to details. Tell us here.