The climate in Rockford during September can be summarized as hot, humid and damp.
September is in the fall / autumn in Rockford and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 30°C (86°F), whilst at night 17°C (63°F) is normal.
Daytime temperature | 29.7°C 85.5°F |
---|---|
Nightly temperature | 17.1°C 62.8°F |
Average temperature | 23.4°C 74.1°F |
Daily sunshine | 8 hrs |
Avg rainfall | 102 mm 4 ins |
Rainy days | 8 days |
Sea temperature | 27°C 80.6°F |
Humidity | 74% |
Windspeed | 10.4kph 7 mph |
On average September is the 4th driest month of the year in Rockford with around 102mm 4 inches of rain making it a damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 8 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Rockford in September 2025.
Best places to visit in September
Hottest month: | July | 32.2°C 90°F |
---|---|---|
Driest month: | October | 76mm 3ins |
Sunniest month: | October | 8hrs |
Coldest month: | January | 11.9°C 53.4°F |
Wettest month: | March | 169mm 6.7ins |