Onarga Illinois Climate Data

Monthly Average Climate Data for Onarga Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.2 °F32.4 °F2.25 in.
February19.3 °F37.1 °F1.93 in.
March28.8 °F49.0 °F2.6 in.
April38.9 °F62.5 °F3.82 in.
May50.6 °F73.5 °F4.48 in.
June60.3 °F82.2 °F4.6 in.
July63.5 °F84.9 °F4.4 in.
August61.2 °F83.3 °F3.61 in.
September53.1 °F78.6 °F3.04 in.
October41.9 °F65.8 °F3.31 in.
November31.4 °F50.3 °F2.77 in.
December21.8 °F37.5 °F2.15 in.
Annual40.6 °F61.4 °F38.96 in.

Climate Data for Onarga 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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