Sibley Illinois Climate Data

Monthly Average Climate Data for Sibley Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.4 °F32.3 °F2.14 in.
February19.6 °F37.1 °F1.82 in.
March28.9 °F48.8 °F2.58 in.
April39.7 °F62.1 °F3.74 in.
May51.7 °F73.1 °F4.47 in.
June61.1 °F81.7 °F4.35 in.
July63.8 °F84.4 °F4.07 in.
August61.5 °F82.8 °F3.58 in.
September53.8 °F78.1 °F3.13 in.
October42.3 °F65.2 °F3.26 in.
November31.4 °F50.1 °F2.71 in.
December21.9 °F37.4 °F2.14 in.
Annual41 °F61.1 °F37.99 in.

Climate Data for Sibley 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 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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