Rantoul Illinois Climate Data

Monthly Average Climate Data for Rantoul Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.2 °F33.2 °F2.25 in.
February20.3 °F37.8 °F2.0 in.
March29.5 °F49.4 °F2.72 in.
April40.0 °F63.0 °F3.98 in.
May52.1 °F74.3 °F4.42 in.
June61.3 °F82.8 °F4.62 in.
July64.1 °F85.2 °F4.23 in.
August61.7 °F83.8 °F3.49 in.
September54.2 °F79.1 °F3.17 in.
October42.4 °F66.1 °F3.33 in.
November31.9 °F50.8 °F3.01 in.
December22.8 °F38.1 °F2.33 in.
Annual41.5 °F62 °F39.55 in.

Climate Data for Rantoul Illinois

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