Rockbridge Illinois Climate Data

Monthly Average Climate Data for Rockbridge Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-6.5 °C2.6 °C57.91 mm
February-4.7 °C5.6 °C52.83 mm
March0.4 °C11.7 °C79.5 mm
April6.2 °C18.6 °C112.27 mm
May12.5 °C23.8 °C125.73 mm
June17.5 °C28.7 °C110.24 mm
July19.3 °C30.3 °C92.71 mm
August18.1 °C29.8 °C85.6 mm
September13.3 °C26.5 °C82.8 mm
October7.1 °C19.8 °C82.55 mm
November1.2 °C11.9 °C84.33 mm
December-3.8 °C5.3 °C60.45 mm
Annual6.7 °C17.9 °C1026.92 mm

Climate Data for Rockbridge Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6b : -20.6°C to -17.8°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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