Roanoke Illinois Climate Data

Monthly Average Climate Data for Roanoke Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.9 °F32.4 °F2.24 in.
February19.3 °F37.3 °F1.97 in.
March28.9 °F49.5 °F2.66 in.
April39.6 °F62.7 °F3.69 in.
May51.3 °F73.6 °F4.51 in.
June61.0 °F82.4 °F4.18 in.
July64.2 °F85.5 °F3.79 in.
August62.1 °F83.7 °F3.49 in.
September54.1 °F78.6 °F3.63 in.
October42.5 °F65.6 °F3.05 in.
November31.4 °F50.4 °F2.62 in.
December21.7 °F37.7 °F2.11 in.
Annual41 °F61.6 °F37.94 in.

Climate Data for Roanoke 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 : -15°F to -10°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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