Salem Illinois Climate Data

Monthly Average Climate Data for Salem Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January22.2 °F38.5 °F3.06 in.
February25.4 °F43.3 °F2.55 in.
March34.2 °F53.8 °F3.7 in.
April44.4 °F65.9 °F4.7 in.
May55.3 °F75.4 °F5.02 in.
June64.1 °F84.3 °F4.81 in.
July67.3 °F87.3 °F4.09 in.
August64.9 °F86.4 °F3.57 in.
September56.6 °F80.3 °F3.5 in.
October45.1 °F68.8 °F3.42 in.
November35.0 °F54.2 °F3.9 in.
December26.9 °F42.8 °F2.94 in.
Annual45.1 °F65.1 °F45.26 in.

Climate Data for Salem 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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