Historical Weather in Rockford, IL
See 55+ years of weather history for any date in Rockford going back to 1970.
Part of Illinois weather history · Illinois temperature records
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Monthly Climate Averages
Historical temperature and precipitation averages for Rockford, IL, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.
Rockford, IL Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Rockford, IL Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Rockford, IL Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Growing Season & Frost in Rockford, IL
Based on the dates the average overnight low reaches freezing (32°F / 0°C), from 50+ years of NOAA station data.
Hours of Daylight in Rockford, IL
Day length across the year at 42.3°N latitude. Computed from solar geometry.
Best Time to Visit Rockford, IL
Rockford, IL has no months that meet our "pleasant" threshold — every season has tradeoffs.
Rockford Temperature Records
- Record High: The hottest temperature ever recorded in Rockford, IL is 105°F, set on July 7, 2012.
- Record Low: The coldest temperature ever recorded in Rockford, IL is -34°F, set on February 3, 1996.
- Data Coverage: Based on 57 years of data from NOAA weather station: ROCKFORD GTR ROCKFORD AP.
All-Time Record High
All-Time Record Low
Monthly Temperature Records in Rockford
| Month | Record High | Record Low |
|---|---|---|
| January | 63°F(1989) | -31°F(2019) |
| February | 78°F(2024) | -34°F(1996) |
| March | 85°F(1986) | -17°F(2015) |
| April | 92°F(1980) | 5°F(1982) |
| May | 99°F(2012) | 22°F(2002) |
| June | 101°F(1988) | 34°F(1985) |
| July | 105°F(2012) | 41°F(1970) |
| August | 104°F(1988) | 36°F(1982) |
| September | 99°F(1978) | 24°F(1974) |
| October | 90°F(2025) | 14°F(1988) |
| November | 77°F(2016) | -10°F(1977) |
| December | 69°F(2021) | -26°F(1983) |