Greenville Illinois Climate Data

Monthly Average Climate Data for Greenville Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January21.2 °F37.3 °F2.84 in.
February24.8 °F42.5 °F2.41 in.
March33.5 °F53.3 °F3.17 in.
April43.8 °F65.4 °F4.87 in.
May54.7 °F75.1 °F4.96 in.
June63.6 °F84.1 °F4.52 in.
July66.8 °F87.1 °F4.08 in.
August64.4 °F86.1 °F3.38 in.
September56.1 °F80.2 °F3.19 in.
October44.5 °F68.2 °F3.19 in.
November34.6 °F53.5 °F3.54 in.
December26.2 °F42.0 °F2.65 in.
Annual44.5 °F64.6 °F42.8 in.

Climate Data for Greenville Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 11 - Apr. 20
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6b : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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