Riverside Illinois Climate Data

Monthly Average Climate Data for Riverside Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-7.8 °C-0.1 °C55.12 mm
February-6.2 °C2 °C52.83 mm
March-1.2 °C8.1 °C59.94 mm
April4.6 °C15.1 °C100.84 mm
May10.7 °C21.3 °C120.65 mm
June16.3 °C26.8 °C110.74 mm
July19.2 °C29.3 °C107.44 mm
August18.4 °C28.2 °C105.16 mm
September14.1 °C24.6 °C82.55 mm
October7.2 °C17.4 °C87.38 mm
November0.9 °C9.4 °C64.52 mm
December-4.6 °C2.8 °C58.93 mm
Annual6 °C15.4 °C1006.1 mm

Climate Data for Riverside Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6a : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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