Vergennes Illinois Climate Data

Monthly Average Climate Data for Vergennes Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January23.9 °F40.8 °F3.1 in.
February27.4 °F45.7 °F2.91 in.
March35.6 °F55.9 °F4.13 in.
April45.8 °F67.4 °F5.21 in.
May56.2 °F76.5 °F5.32 in.
June64.9 °F85.3 °F4.68 in.
July68.3 °F88.0 °F3.95 in.
August65.7 °F86.9 °F3.11 in.
September57.3 °F81.1 °F3.22 in.
October45.7 °F70.0 °F3.52 in.
November35.8 °F56.2 °F4.09 in.
December28.0 °F45.0 °F3.33 in.
Annual46.2 °F66.6 °F46.57 in.

Climate Data for Vergennes Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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