Grandwood Park Illinois Climate Data

Monthly Average Climate Data for Grandwood Park Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.6 °F29.6 °F1.99 in.
February17.3 °F33.2 °F2.0 in.
March26.6 °F43.9 °F2.28 in.
April36.9 °F56.4 °F3.92 in.
May47.6 °F67.7 °F4.35 in.
June57.7 °F77.6 °F4.5 in.
July62.8 °F82.1 °F3.71 in.
August61.5 °F80.5 °F3.63 in.
September53.7 °F73.7 °F3.57 in.
October42.1 °F60.9 °F3.21 in.
November31.0 °F47.1 °F2.44 in.
December20.8 °F35.0 °F2.19 in.
Annual39.4 °F57.3 °F37.79 in.

Climate Data for Grandwood Park 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 : -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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