Allerton Illinois Climate Data

Monthly Average Climate Data for Allerton Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.9 °F33.7 °F2.43 in.
February21.1 °F38.3 °F2.03 in.
March30.3 °F50.1 °F2.8 in.
April40.9 °F63.3 °F4.34 in.
May52.7 °F73.9 °F4.49 in.
June61.9 °F82.4 °F4.56 in.
July64.3 °F84.5 °F4.14 in.
August61.9 °F83.2 °F2.76 in.
September54.6 °F78.7 °F3.12 in.
October42.9 °F65.9 °F3.29 in.
November32.3 °F51.0 °F3.35 in.
December23.6 °F38.7 °F2.49 in.
Annual42 °F62 °F39.8 in.

Climate Data for Allerton Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 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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