Macon County (Decatur)
September
Weather in Macon County, Illinois for September 2027
Your guide to Macon County weather in September - trends and predictions
In general, the average temperature in Macon County at the beginning of September is 28.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 24.5 °C by the end of September.
Macon County experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 161.3 mm.
Is September a good time to visit Macon County? check out the best time to travel to Macon County page.
✨ Is September a good time to visit Macon County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
24
Dry days
6
Rainy days
0
Snow days
27°/15°
Temperatures
17 km/h
Avg max wind
66 %
Avg humidity
Macon County Weather September
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Temperatures trend during September in Macon County
See the weather trend as well as the moving average line
September weather in Macon 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 |  Overcast | 29° /17° | 0 mm | 6 | |
| Sept. 4 |  Patchy rain possible | 29° /16° | 1.7 mm | 7 | |
| Sept. 5 | Sunny | 29° /17° | 0 mm | 7 | |
| Sept. 6 |  Mist | 26° /13° | 0.1 mm | 6 | |
| Sept. 7 | Sunny | 24° /10° | 0 mm | 7 | |
| Sept. 8 | Sunny | 26° /9° | 0 mm | 6 | |
| Sept. 9 | Overcast | 27° /13° | 0 mm | 6 | |
| Sept. 10 |  Moderate rain | 27° /15° | 13.7 mm | 5 | |
| Sept. 11 | Sunny | 30° /16° | 0 mm | 6 | |
| Sept. 12 | Overcast | 31° /17° | 0 mm | 7 | |
| Sept. 13 |  Light rain | 29° /17° | 0.5 mm | 6 | |
| Sept. 14 |  Partly cloudy | 31° /17° | 0 mm | 7.2 | |
| Sept. 15 | Patchy rain possible | 33° /21° | 0.9 mm | 6 | |
| Sept. 16 | Light rain | 32° /18° | 3.8 mm | 6 | |
| Sept. 17 |  Cloudy | 31° /17° | 0.1 mm | 6.9 | |
| Sept. 18 | Patchy rain possible | 29° /16° | 2.4 mm | 5 | |
| Sept. 19 | Light rain | 30° /18° | 3.1 mm | 6 | |
| Sept. 20 | Light rain | 28° /17° | 5.5 mm | 5 | |
| Sept. 21 | Moderate rain | 24° /16° | 22.4 mm | 4 | |
| Sept. 22 | Light rain | 22° /16° | 3.1 mm | 6 | |
| Sept. 23 | Patchy rain possible | 22° /16° | 1.1 mm | 4 | |
| Sept. 24 |  Heavy rain | 20° /15° | 102.9 mm | 3 | |
| Sept. 25 | Mist | 22° /13° | 0 mm | 4 | |
| Sept. 26 | Overcast | 24° /11° | 0 mm | 4 | |
| Sept. 27 | Overcast | 25° /14° | 0 mm | 4 | |
| Sept. 28 | Overcast | 27° /14° | 0 mm | 5.9 | |
| Sept. 29 | Overcast | 27° /15° | 0 mm | 5.8 | |
| Sept. 30 | Mist | 27° /18° | 0 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Macon 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 Macon County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Macon County in September - FAQ
What are the expected maximum and minimum temperatures in Macon 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 Macon County during September?
Significant rainfall exceeding 161.3 mm is expected in Macon 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 Macon County during September?
The average wind speed in Macon County during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Macon County
Explore the daily rainfall trends and prepare for Macon Countys September weather 💧
Typically, Macon County has 6 rainy days in September with a total of 161.3 mm of rainfall.
UV exposure in Macon County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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