Byron Illinois Climate Data

Monthly Average Climate Data for Byron Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-10.9 °C-1.9 °C42.16 mm
February-9.1 °C0.4 °C42.93 mm
March-3.1 °C7.4 °C56.64 mm
April2.9 °C15 °C94.74 mm
May9.5 °C21.3 °C115.82 mm
June15.1 °C26.5 °C131.83 mm
July17 °C28.2 °C110.24 mm
August15.8 °C27.3 °C103.12 mm
September11.2 °C23.9 °C86.87 mm
October4.7 °C16.7 °C74.42 mm
November-1.5 °C8.2 °C52.58 mm
December-7.3 °C1.2 °C48.77 mm
Annual3.7 °C14.5 °C960.12 mm

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 : -26.1°C to -23.3°C
Plant Hardiness Zone - 2012Zone 5a : -28.9°C to -26.1°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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