Shirley Illinois Climate Data

Monthly Average Climate Data for Shirley Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.3 °F32.7 °F2.29 in.
February19.7 °F37.7 °F1.96 in.
March29.1 °F49.7 °F2.7 in.
April40.0 °F63.0 °F3.84 in.
May51.5 °F73.7 °F4.52 in.
June61.1 °F82.5 °F4.32 in.
July64.2 °F85.7 °F3.93 in.
August62.2 °F83.7 °F3.71 in.
September54.4 °F78.7 °F3.34 in.
October42.8 °F65.5 °F3.37 in.
November31.6 °F50.6 °F2.81 in.
December22.1 °F37.9 °F2.36 in.
Annual41.3 °F61.8 °F39.15 in.

Climate Data for Shirley Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
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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