Steward Illinois Climate Data

Monthly Average Climate Data for Steward Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.6 °F28.6 °F1.58 in.
February16.2 °F33.0 °F1.62 in.
March26.4 °F45.4 °F2.12 in.
April36.8 °F59.2 °F3.47 in.
May48.7 °F70.7 °F4.75 in.
June58.6 °F79.9 °F4.87 in.
July62.0 °F82.7 °F3.99 in.
August59.8 °F80.9 °F3.86 in.
September51.5 °F75.2 °F3.39 in.
October39.8 °F62.4 °F2.77 in.
November29.1 °F47.1 °F2.19 in.
December18.8 °F34.1 °F1.76 in.
Annual38.4 °F58.3 °F36.37 in.

Climate Data for Steward 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 5a : -20°F to -15°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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