Rockford (IL)
September
Weather in Rockford, Illinois for September 2027
Your guide to Rockford weather in September - trends and predictions
In general, the average temperature in Rockford at the beginning of September is 27.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 23.3 °C by the end of September.
Rockford experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 121.6 mm.
Is September a good time to visit Rockford? check out the best time to travel to Rockford page.
✨ Is September a good time to visit Rockford? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
22
Dry days
8
Rainy days
0
Snow days
26°/13°
Temperatures
18 km/h
Avg max wind
72 %
Avg humidity
Rockford Weather September
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Temperatures trend during September in Rockford
See the weather trend as well as the moving average line
September weather in Rockford day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 29° /13° | 0 mm | 7 | |
| Sept. 2 | Sunny | 30° /13° | 0 mm | 7 | |
| Sept. 3 |  Light rain | 30° /15° | 8.6 mm | 7 | |
| Sept. 4 |  Cloudy | 30° /15° | 0 mm | 6 | |
| Sept. 5 |  Overcast | 29° /17° | 0.8 mm | 6 | |
| Sept. 6 |  Patchy rain possible | 25° /11° | 1 mm | 5 | |
| Sept. 7 | Patchy rain possible | 23° /8° | 0.1 mm | 5 | |
| Sept. 8 |  Mist | 24° /9° | 0 mm | 5 | |
| Sept. 9 |  Moderate rain | 27° /11° | 16.9 mm | 5 | |
| Sept. 10 | Fog | 28° /12° | 0 mm | 6 | |
| Sept. 11 | Light rain | 26° /13° | 3.5 mm | 6 | |
| Sept. 12 | Fog | 27° /13° | 0 mm | 6 | |
| Sept. 13 | Mist | 25° /14° | 0.6 mm | 6 | |
| Sept. 14 | Mist | 27° /11° | 0 mm | 6 | |
| Sept. 15 | Light rain | 29° /15° | 5.8 mm | 6 | |
| Sept. 16 | Light rain shower | 28° /15° | 1.3 mm | 5 | |
| Sept. 17 | Light rain | 26° /12° | 9.8 mm | 5 | |
| Sept. 18 | Mist | 26° /12° | 0.6 mm | 6 | |
| Sept. 19 |  Moderate or heavy rain with thunder | 26° /14° | 26.5 mm | 5 | |
| Sept. 20 | Moderate rain | 24° /16° | 19.7 mm | 5 | |
| Sept. 21 | Light rain | 23° /15° | 2.5 mm | 5 | |
| Sept. 22 | Light rain | 22° /14° | 8.8 mm | 5 | |
| Sept. 23 | Mist | 23° /11° | 0 mm | 5 | |
| Sept. 24 | Overcast | 21° /12° | 0.1 mm | 5 | |
| Sept. 25 | Patchy rain possible | 22° /12° | 1.6 mm | 4 | |
| Sept. 26 | Light rain | 24° /11° | 7.7 mm | 5 | |
| Sept. 27 | Light rain shower | 23° /11° | 1.1 mm | 5 | |
| Sept. 28 | Patchy rain possible | 23° /13° | 0 mm | 5 | |
| Sept. 29 | Mist | 24° /12° | 0 mm | 5 | |
| Sept. 30 | Light rain | 26° /15° | 4.5 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Rockford 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 Rockford forecast closer to your planned date for the most up-to-date weather information.
Change Month
Rockford in September - FAQ
What are the expected maximum and minimum temperatures in Rockford during September?
Enjoy moderate daytime temperatures of up to 26° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Rockford during September?
Significant rainfall exceeding 121.6 mm is expected in Rockford during September, occurring over more than 8 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Rockford during September?
The average wind speed in Rockford during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Rockford
Explore the daily rainfall trends and prepare for Rockfords September weather 💧
Typically, Rockford has 8 rainy days in September with a total of 121.6 mm of rainfall.
UV exposure in Rockford during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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