Long Grove Illinois Climate Data

Monthly Average Climate Data for Long Grove Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.5 °F30.7 °F1.97 in.
February18.2 °F34.3 °F1.98 in.
March27.5 °F45.3 °F2.28 in.
April37.8 °F57.7 °F3.79 in.
May48.6 °F68.9 °F4.46 in.
June58.6 °F79.1 °F4.46 in.
July64.0 °F83.5 °F3.78 in.
August62.7 °F81.5 °F3.95 in.
September54.6 °F74.9 °F3.32 in.
October42.7 °F62.0 °F3.26 in.
November31.4 °F47.8 °F2.37 in.
December21.5 °F36.0 °F2.1 in.
Annual40.3 °F58.5 °F37.72 in.

Climate Data for Long Grove Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°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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