Lyndon Illinois Climate Data

Monthly Average Climate Data for Lyndon Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-10.5 °C-1.2 °C42.67 mm
February-8.4 °C1.3 °C44.96 mm
March-2.4 °C8.3 °C67.31 mm
April3.5 °C15.8 °C95.76 mm
May10.1 °C22.2 °C123.95 mm
June15.6 °C27.3 °C130.05 mm
July17.4 °C29.1 °C103.89 mm
August16.3 °C28.1 °C107.19 mm
September11.6 °C24.6 °C90.17 mm
October5.2 °C17.5 °C76.45 mm
November-1.2 °C8.9 °C55.12 mm
December-6.9 °C1.8 °C51.56 mm
Annual4.2 °C15.3 °C989.08 mm

Climate Data for Lyndon 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 ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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