Rockford Illinois Climate Data

Monthly Average Climate Data for Rockford Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-10.7 °C-1.9 °C39.62 mm
February-8.9 °C0.3 °C43.18 mm
March-3.2 °C7.2 °C54.1 mm
April2.9 °C14.8 °C95 mm
May9.4 °C21.2 °C114.81 mm
June15 °C26.6 °C140.46 mm
July17.1 °C28.4 °C96.01 mm
August16.1 °C27.5 °C106.93 mm
September11.4 °C23.9 °C85.09 mm
October4.8 °C16.7 °C71.63 mm
November-1.4 °C8.2 °C58.17 mm
December-7.2 °C1.2 °C52.07 mm
Annual3.8 °C14.5 °C957.07 mm

Climate Data for Rockford Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -26.1°C to -23.3°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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