Peoria County (Peoria)
September
Weather in Peoria County, Illinois for September 2027
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 28.2 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 24.2 °C by the end of September.
Peoria County experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 170.1 mm.
Is September a good time to visit Peoria County? check out the best time to travel to Peoria County page.
✨ Is September a good time to visit Peoria County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
23
Dry days
7
Rainy days
0
Snow days
27°/15°
Temperatures
17 km/h
Avg max wind
67 %
Avg humidity
Peoria County Weather September
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Temperatures trend during September in Peoria County
See the weather trend as well as the moving average line
September weather in Peoria County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 31° /16° | 0 mm | 7 | |
| Sept. 2 | Sunny | 29° /15° | 0 mm | 7 | |
| Sept. 3 |  Heavy rain | 30° /16° | 33.2 mm | 7 | |
| Sept. 4 | Sunny | 30° /15° | 0 mm | 7 | |
| Sept. 5 |  Mist | 29° /18° | 0 mm | 7 | |
| Sept. 6 |  Partly cloudy | 24° /13° | 0 mm | 6 | |
| Sept. 7 | Sunny | 24° /9° | 0 mm | 6 | |
| Sept. 8 | Sunny | 27° /9° | 0 mm | 6 | |
| Sept. 9 |  Moderate rain | 26° /13° | 18.3 mm | 5 | |
| Sept. 10 | Heavy rain | 28° /15° | 31.6 mm | 5 | |
| Sept. 11 | Sunny | 30° /15° | 0.1 mm | 7 | |
| Sept. 12 | Sunny | 31° /16° | 0.1 mm | 7 | |
| Sept. 13 |  Overcast | 28° /17° | 0.4 mm | 6 | |
| Sept. 14 |  Patchy rain possible | 30° /16° | 0 mm | 7 | |
| Sept. 15 | Patchy rain possible | 32° /19° | 1 mm | 5 | |
| Sept. 16 |  Light rain | 31° /19° | 4.7 mm | 6 | |
| Sept. 17 | Light rain | 30° /16° | 5.7 mm | 6 | |
| Sept. 18 | Light rain | 28° /15° | 6.1 mm | 6 | |
| Sept. 19 | Patchy rain possible | 28° /17° | 1.8 mm | 5 | |
| Sept. 20 |  Heavy rain at times | 26° /17° | 12 mm | 4 | |
| Sept. 21 | Overcast | 23° /16° | 0.1 mm | 4 | |
| Sept. 22 | Moderate rain | 21° /14° | 14.3 mm | 5 | |
| Sept. 23 | Patchy rain possible | 24° /14° | 1.6 mm | 4 | |
| Sept. 24 | Heavy rain | 21° /14° | 29.5 mm | 5 | |
| Sept. 25 | Sunny | 22° /13° | 0.2 mm | 4 | |
| Sept. 26 |  Cloudy | 24° /11° | 0 mm | 4 | |
| Sept. 27 | Overcast | 25° /13° | 0 mm | 5 | |
| Sept. 28 | Overcast | 25° /14° | 0 mm | 5.7 | |
| Sept. 29 | Cloudy | 28° /14° | 0 mm | 5 | |
| Sept. 30 | Light rain | 25° /16° | 9.4 mm | 5 | |
| 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.
Change Month
Peoria County in September - FAQ
What are the expected maximum and minimum temperatures in Peoria County during September?
During September, expect a variety of temperatures with highs around 27° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Peoria County during September?
Significant rainfall exceeding 170.1 mm is expected in Peoria 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 Peoria County during September?
The average wind speed in Peoria County during September is 17 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 💧
Typically, Peoria County has 7 rainy days in September with a total of 170.1 mm of rainfall.
UV exposure in Peoria County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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