Westervelt Illinois Climate Data

Monthly Average Climate Data for Westervelt Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January19.7 °F35.8 °F2.45 in.
February22.7 °F40.8 °F2.07 in.
March31.9 °F51.8 °F2.86 in.
April42.4 °F64.6 °F4.5 in.
May53.7 °F74.8 °F4.71 in.
June62.5 °F83.4 °F4.78 in.
July65.5 °F86.5 °F3.87 in.
August63.4 °F85.4 °F3.09 in.
September55.3 °F80.3 °F3.09 in.
October43.9 °F67.8 °F3.4 in.
November33.3 °F52.5 °F3.45 in.
December25.1 °F40.7 °F2.55 in.
Annual43.3 °F63.7 °F40.82 in.

Climate Data for Westervelt Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 11 - Apr. 20
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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