Geneva Illinois Climate Data

Monthly Average Climate Data for Geneva Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.9 °F30.6 °F2.0 in.
February17.7 °F34.5 °F1.93 in.
March27.3 °F46.4 °F2.35 in.
April37.8 °F59.4 °F3.76 in.
May48.8 °F70.6 °F4.92 in.
June58.8 °F80.3 °F4.37 in.
July63.4 °F84.1 °F3.77 in.
August61.6 °F82.2 °F3.94 in.
September53.7 °F76.0 °F3.36 in.
October41.8 °F62.9 °F3.46 in.
November30.7 °F48.2 °F2.58 in.
December20.8 °F35.9 °F2.2 in.
Annual39.8 °F59.3 °F38.64 in.

Climate Data for Geneva 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