Andover Illinois Climate Data

Monthly Average Climate Data for Andover Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-10.1 °C-1.1 °C41.91 mm
February-8.2 °C1.4 °C47.5 mm
March-2.3 °C8.8 °C60.96 mm
April3.8 °C16.2 °C96.27 mm
May10.4 °C22.3 °C125.22 mm
June15.9 °C27.2 °C121.16 mm
July17.9 °C28.8 °C102.62 mm
August16.7 °C27.9 °C97.28 mm
September12.1 °C24.7 °C92.46 mm
October5.6 °C17.6 °C73.41 mm
November-1 °C9.2 °C60.45 mm
December-6.7 °C2 °C51.82 mm
Annual4.5 °C15.4 °C971.06 mm

Climate Data for Andover Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
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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