Effingham (IL)
September
Weather in Effingham, Illinois for September 2025
Your guide to Effingham weather in September - trends and predictions
In general, the average temperature in Effingham at the beginning of September is 27 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 22.3 °F by the end of September.
Effingham experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 107.5 mm.
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Temperatures
Rain 🌧️
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22
Dry days
8
Rainy days
0
Snow days
26°/16°
Temperatures
17 km/h
Avg max wind
62 %
Avg humidity
Effingham Weather September
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Temperatures trend during September in Effingham
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September weather in Effingham day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Patchy rain possible | 30° /19° | 0.6 mm | 7 | |
| Sept. 2 |  Sunny | 25° /12° | 0 mm | 7 | |
| Sept. 3 |  Overcast | 25° /13° | 0 mm | 6 | |
| Sept. 4 |  Partly cloudy | 30° /14° | 0 mm | 8 | |
| Sept. 5 | Patchy rain possible | 31° /17° | 0.1 mm | 7 | |
| Sept. 6 |  Cloudy | 26° /15° | 0 mm | 6 | |
| Sept. 7 | Sunny | 22° /10° | 0 mm | 6 | |
| Sept. 8 | Sunny | 22° /7° | 0 mm | 6 | |
| Sept. 9 | Sunny | 27° /11° | 0 mm | 7 | |
| Sept. 10 | Sunny | 29° /13° | 0 mm | 7 | |
| Sept. 11 | Sunny | 31° /15° | 0 mm | 8 | |
| Sept. 12 | Sunny | 29° /17° | 0 mm | 7 | |
| Sept. 13 |  Moderate or heavy rain shower | 24° /17° | 3.2 mm | 5 | |
| Sept. 14 | Cloudy | 30° /17° | 0 mm | 7 | |
| Sept. 15 | Cloudy | 31° /18° | 0 mm | 7 | |
| Sept. 16 | Sunny | 31° /18° | 0 mm | 8 | |
| Sept. 17 | Cloudy | 29° /15° | 0 mm | 6 | |
| Sept. 18 | Sunny | 30° /15° | 0 mm | 8 | |
| Sept. 19 | Cloudy | 30° /17° | 0 mm | 7 | |
| Sept. 20 | Moderate rain at times | 29° /18° | 0.9 mm | 6 | |
| Sept. 21 | Overcast | 29° /18° | 1.2 mm | 6 | |
| Sept. 22 | Moderate or heavy rain shower | 24° /19° | 15.5 mm | 5 | |
| Sept. 23 | Moderate or heavy rain shower | 21° /17° | 36.3 mm | 5 | |
| Sept. 24 |  Heavy rain at times | 21° /17° | 5.5 mm | 5 | |
| Sept. 25 | Overcast | 22° /15° | 0 mm | 5 | |
| Sept. 26 | Patchy rain possible | 23° /13° | 0.9 mm | 5 | |
| Sept. 27 | Moderate or heavy rain shower | 21° /18° | 39.5 mm | 5 | |
| Sept. 28 | Moderate rain at times | 24° /17° | 2.3 mm | 5 | |
| Sept. 29 | Patchy rain possible | 21° /18° | 1.5 mm | 5 | |
| Sept. 30 |  Fog | 24° /18° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Effingham 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 Effingham forecast closer to your planned date for the most up-to-date weather information.
Change Month
Effingham in September - FAQ
What are the expected maximum and minimum temperatures in Effingham during September?
During September, expect a variety of temperatures with highs around 26° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Effingham during September?
Significant rainfall exceeding 107.5 mm is expected in Effingham during September, occurring over more than 8 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Effingham during September?
The average wind speed in Effingham during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Effingham
Explore the daily rainfall trends and prepare for Effinghams September weather 💧
UV exposure in Effingham during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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