Westfield Illinois Climate Data

Monthly Average Climate Data for Westfield Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January19.7 °F35.9 °F2.82 in.
February22.6 °F40.8 °F2.4 in.
March31.8 °F51.9 °F3.11 in.
April42.4 °F64.6 °F4.84 in.
May53.8 °F74.5 °F4.57 in.
June62.7 °F83.0 °F4.88 in.
July65.2 °F86.1 °F4.25 in.
August63.2 °F85.0 °F2.97 in.
September55.5 °F79.6 °F3.11 in.
October44.1 °F67.2 °F3.61 in.
November33.6 °F52.6 °F3.68 in.
December25.1 °F40.5 °F2.8 in.
Annual43.3 °F63.5 °F43.04 in.

Climate Data for Westfield 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 6a : -10°F to -5°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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