Oak Grove Illinois Climate Data

Monthly Average Climate Data for Oak Grove Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.2 °F30.3 °F1.54 in.
February17.7 °F34.8 °F1.74 in.
March28.3 °F47.7 °F2.46 in.
April39.4 °F61.1 °F3.68 in.
May51.3 °F71.9 °F4.85 in.
June61.3 °F81.2 °F4.81 in.
July65.0 °F84.3 °F4.17 in.
August62.8 °F82.5 °F3.97 in.
September54.6 °F76.4 °F3.52 in.
October42.7 °F63.6 °F2.86 in.
November30.7 °F48.6 °F2.3 in.
December20.2 °F35.7 °F2.0 in.
Annual40.7 °F59.8 °F37.9 in.

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