Sandwich Illinois Climate Data

Monthly Average Climate Data for Sandwich Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.3 °F30.1 °F1.83 in.
February17.6 °F34.3 °F1.79 in.
March27.4 °F46.5 °F2.34 in.
April38.0 °F59.8 °F3.73 in.
May49.5 °F71.2 °F4.75 in.
June59.5 °F80.6 °F4.59 in.
July63.1 °F83.7 °F3.89 in.
August61.0 °F81.8 °F3.86 in.
September53.0 °F76.2 °F3.45 in.
October41.1 °F63.3 °F3.23 in.
November30.5 °F48.3 °F2.5 in.
December20.3 °F35.4 °F2.09 in.
Annual39.6 °F59.3 °F38.05 in.

Climate Data for Sandwich 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 : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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