Round Lake Beach Illinois Climate Data

Monthly Average Climate Data for Round Lake Beach Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-9.9 °C-1.4 °C48.77 mm
February-8.4 °C0.6 °C49.28 mm
March-3.2 °C6.8 °C57.66 mm
April2.6 °C13.8 °C98.81 mm
May8.6 °C20.2 °C113.03 mm
June14.2 °C25.7 °C118.36 mm
July16.9 °C28.1 °C96.52 mm
August16.1 °C27.1 °C95.76 mm
September11.9 °C23.3 °C91.19 mm
October5.4 °C16.1 °C80.52 mm
November-0.8 °C8.2 °C60.96 mm
December-6.5 °C1.5 °C54.86 mm
Annual3.9 °C14.2 °C965.72 mm

Climate Data for Round Lake Beach Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
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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