Zion Illinois Climate Data

Monthly Average Climate Data for Zion Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.2 °F30.3 °F1.94 in.
February18.9 °F33.4 °F1.99 in.
March27.8 °F42.8 °F2.25 in.
April37.8 °F53.2 °F3.9 in.
May47.8 °F64.3 °F4.28 in.
June57.9 °F74.3 °F4.17 in.
July64.3 °F80.0 °F3.51 in.
August63.9 °F78.8 °F3.55 in.
September56.1 °F72.3 °F3.41 in.
October44.2 °F60.3 °F3.19 in.
November32.6 °F47.3 °F2.41 in.
December22.3 °F35.7 °F2.1 in.
Annual40.8 °F56.1 °F36.7 in.

Climate Data for Zion Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 11 - May 20
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 ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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