Rochelle Illinois Climate Data

Monthly Average Climate Data for Rochelle Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-10.9 °C-1.8 °C42.67 mm
February-8.9 °C0.6 °C42.67 mm
March-3.2 °C7.4 °C55.88 mm
April2.7 °C15.2 °C90.42 mm
May9.3 °C21.4 °C118.11 mm
June14.7 °C26.5 °C128.52 mm
July16.6 °C28.1 °C100.84 mm
August15.4 °C27.2 °C98.81 mm
September10.8 °C23.9 °C87.63 mm
October4.3 °C16.8 °C70.61 mm
November-1.6 °C8.4 °C58.67 mm
December-7.4 °C1.2 °C48.01 mm
Annual3.5 °C14.6 °C942.84 mm

Climate Data for Rochelle 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 5b : -26.1°C to -23.3°C
Plant Hardiness Zone - 2012Zone 5a : -28.9°C to -26.1°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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