Jerseyville Illinois Climate Data

Monthly Average Climate Data for Jerseyville Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January21.0 °F37.5 °F2.46 in.
February24.4 °F42.9 °F2.26 in.
March33.4 °F53.5 °F3.19 in.
April44.0 °F65.2 °F4.61 in.
May55.1 °F74.8 °F5.14 in.
June64.4 °F83.4 °F4.17 in.
July67.5 °F86.7 °F3.61 in.
August65.4 °F85.7 °F3.7 in.
September56.9 °F79.3 °F3.38 in.
October45.4 °F67.7 °F3.21 in.
November34.6 °F53.6 °F3.45 in.
December25.8 °F42.2 °F2.55 in.
Annual44.8 °F64.4 °F41.73 in.

Climate Data for Jerseyville 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 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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