Rockford Average Temperature by Month

This page shows the average temperature in each month of the year in Rockford, Illinois. It is based on NOAA data for the years 1991–2020.
What's the Hottest Month in Rockford?
In Rockford, Illinois, the warmest month is July, with an average daily high temperature of 84.0 °F and an average low of 63.1 °F.
What's the Coldest Month in Rockford?
In Rockford, Illinois, the coolest month is January, with an average daily high temperature of 29.2 °F and an average low of 13.9 °F.
Month Avg. High Avg. Low
January 29.2 °F 13.9 °F
February 33.6 °F 17.2 °F
March 46.6 °F 27.6 °F
April 59.8 °F 37.9 °F
May 71.3 °F 49.0 °F
June 80.8 °F 59.1 °F
July 84.0 °F 63.1 °F
August 82.1 °F 61.2 °F
September 75.4 °F 53.0 °F
October 62.4 °F 41.2 °F
November 47.2 °F 30.0 °F
December 34.4 °F 19.7 °F
Year 59.0 °F 39.5 °F
Weather Station Details
Years Station Coordinates
1951–2024 Greater Rockford Airport location
1893–1950 Rockford location