Sangamon County (Springfield)
September
Weather in Sangamon County, Illinois for September 2026
Your guide to Sangamon County weather in September - trends and predictions
So far, September 2026 in Sangamon County shows a warmer trend than usual by 2.7 °F.
The forecast for the next days in Sangamon County predicts temperatures to be around 22 °F, close to the historical average.
In general, the average temperature in Sangamon County at the beginning of September is 29.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.6 °F by the end of September.
Sangamon County experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 132.3 mm.
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Temperatures
Rain 🌧️
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24
Dry days
6
Rainy days
0
Snow days
27°/15°
Temperatures
17 km/h
Avg max wind
65 %
Avg humidity
Sangamon County Weather September
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Temperatures trend during September in Sangamon County
See the weather trend as well as the moving average line
September weather in Sangamon 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 | 31° /15° | 0 mm | 7 | |
| Sept. 3 |  Overcast | 30° /16° | 0 mm | 6 | |
| Sept. 4 | Sunny | 31° /16° | 0 mm | 7 | |
| Sept. 5 |  Mist | 30° /16° | 0 mm | 6 | |
| Sept. 6 |  Partly cloudy | 27° /13° | 0.1 mm | 7 | |
| Sept. 7 | Sunny | 25° /10° | 0 mm | 6 | |
| Sept. 8 | Sunny | 28° /9° | 0 mm | 7 | |
| Sept. 9 | Sunny | 28° /13° | 0.1 mm | 6 | |
| Sept. 10 | Sunny | 28° /15° | 9 mm | 5 | |
| Sept. 11 | Sunny | 31° /16° | 0 mm | 6 | |
| Sept. 12 | Sunny | 32° /16° | 0 mm | 7 | |
| Sept. 13 |  Light rain | 29° /18° | 1 mm | 6 | |
| Sept. 14 | Partly cloudy | 33° /17° | 0.2 mm | 7 | |
| Sept. 15 |  Patchy rain possible | 33° /20° | 0.8 mm | 6 | |
| Sept. 16 | Sunny | 33° /18° | 2.5 mm | 6 | |
| Sept. 17 |  Cloudy | 31° /18° | 0.5 mm | 7 | |
| Sept. 18 | Cloudy | 30° /16° | 0.9 mm | 5 | |
| Sept. 19 | Partly cloudy | 30° /18° | 1.5 mm | 6 | |
| Sept. 20 | Overcast | 31° /17° | 4.3 mm | 6.1 | |
| Sept. 21 | Patchy rain possible | 22° /16° | 5.4 mm | 2.3 | |
| Sept. 22 | Overcast | 18° /14° | 0.1 mm | 2.2 | |
| Sept. 23 | Sunny | 23° /14° | 0 mm | 6 | |
| Sept. 24 | Sunny | 24° /13° | 0 mm | 6 | |
| Sept. 25 | Patchy rain possible | 21° /15° | 3.4 mm | 5 | |
| Sept. 26 | Overcast | 23° /14° | 0 mm | 6 | |
| Sept. 27 | Sunny | 25° /15° | 0 mm | 6 | |
| Sept. 28 | Overcast | 18° /9° | 9.3 mm | 4 | |
| Sept. 29 | Sunny | 17° /6° | 0 mm | 5 | |
| Sept. 30 | Sunny | 23° /11° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Sangamon 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 Sangamon County forecast closer to your planned date for the most up-to-date weather information.
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Sangamon County in September - FAQ
What are the expected maximum and minimum temperatures in Sangamon 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 Sangamon County during September?
Significant rainfall exceeding 132.3 mm is expected in Sangamon County during September, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Sangamon County during September?
The average wind speed in Sangamon County during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Sangamon County
Explore the daily rainfall trends and prepare for Sangamon Countys September weather 💧
Typically, Sangamon County has 6 rainy days in September with a total of 132.3 mm of rainfall.
UV exposure in Sangamon County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Sangamon County?Get accurate weather forecasts for Sangamon County, located at latitude 39.802 and longitude -89.644. Stay updated with localized weather information tailored for Sangamon County.
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