Carterville Illinois Climate Data

Monthly Average Climate Data for Carterville Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January24.0 °F41.0 °F3.38 in.
February27.2 °F46.1 °F3.1 in.
March35.5 °F56.0 °F4.32 in.
April45.6 °F67.5 °F5.38 in.
May56.0 °F76.3 °F5.29 in.
June64.5 °F85.0 °F4.59 in.
July68.1 °F87.8 °F3.89 in.
August65.5 °F87.1 °F3.12 in.
September57.3 °F81.3 °F3.25 in.
October45.7 °F69.9 °F3.62 in.
November35.9 °F56.3 °F4.28 in.
December27.9 °F45.2 °F3.63 in.
Annual46.1 °F66.6 °F47.85 in.

Climate Data for Carterville Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 11 - Apr. 20
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 ClassificationCfa - Humid Subtropical Climate
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