Byron Illinois Climate Data

Monthly Average Climate Data for Byron Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.4 °F28.6 °F1.66 in.
February15.7 °F32.8 °F1.69 in.
March26.4 °F45.3 °F2.23 in.
April37.3 °F59.0 °F3.73 in.
May49.1 °F70.4 °F4.56 in.
June59.1 °F79.7 °F5.19 in.
July62.6 °F82.7 °F4.34 in.
August60.5 °F81.2 °F4.06 in.
September52.1 °F75.0 °F3.42 in.
October40.5 °F62.1 °F2.93 in.
November29.3 °F46.8 °F2.07 in.
December18.8 °F34.1 °F1.92 in.
Annual38.7 °F58.1 °F37.8 in.

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