Measurements:
°C
°F
Rockford
-2°F
N 9 mph
Feels like: -16°F
Precip: 0%
World Resorts USA Rockford Weather September Weather in Rockford

Rockford Weather: September

Average Day Temperature: 78.3°F
Average Night Temperature: 58.0°F
Number of Sunny Days: 17 days
Sunshine Hours: 11.8 - 13.1 hours
Number of Rainy Days: 1 day
Precipitation Totals: 0.7 in

Air Temperature in September, °F

Select Year: 2025 2024 2023

The highest day temperature in September 2025 was 93°F. The lowest night temperature was 35°F. The average values for day and night temperatures during September were 80.6°F и 54.5°F respectivly.

Sunny, Cloudy and Gloomy days

Most of the days in September are sunny but you can also expect cloudy and gloomy days.

Precipitation Totals in September, in

Precipitation total in September for Rockford is 0.7 in.

Wind Speed in September, mph

The average wind speed in September is 8.4 mph. It makes September one of the most windless months of the year for Rockford.

Average Sunny Hours Per Day

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Rockford in September is 8.5 hours.

Best Time to Visit Rockford
The most sunny months:
September 17 days
October 14 days
June 13 days
The most warm months:
July 83.5 °F
August 83.3 °F
June 81.3 °F
The most cold months:
January 24.4 °F
February 28.0 °F
December 33.5 °F
The most rainy months:
May 3 days
April 3 days
March 2 days
The most windy months:
March 11 mph
April 11 mph
November 10 mph

Rockford on the Weather Map

USA Resorts:
NAME
Chicago -2
Hawaii +78
Honolulu +78
Houston +44
Las Vegas +38
Los Angeles +50
Maui +70
Miami +68
Miami Beach +80
New York +16
San Diego +52
San Francisco +46
Sarasota +64
Tampa +62
Washington +26
24 Hours Weather Forecast
Rockford
Local time: 03:51
05 dec, friday
0600 4°F
N
9 mph
0900 10°F
N
11 mph
1200 22°F
NE
13 mph
1500 26°F
NE
14 mph
1800 26°F
NE
11 mph
2100 28°F
NE
11 mph
06 dec, saturday
0000 28°F
E
12 mph
0300 30°F
E
7 mph