Cahokia Illinois Climate Data

Monthly Average Climate Data for Cahokia Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January23.2 °F40.2 °F2.72 in.
February26.9 °F45.6 °F2.36 in.
March35.5 °F55.5 °F3.52 in.
April46.2 °F67.8 °F4.64 in.
May56.8 °F76.8 °F5.24 in.
June65.8 °F85.6 °F4.7 in.
July69.6 °F89.2 °F4.29 in.
August67.7 °F87.8 °F3.85 in.
September59.2 °F81.1 °F3.41 in.
October47.6 °F69.8 °F3.35 in.
November36.6 °F55.9 °F3.54 in.
December27.7 °F44.6 °F2.86 in.
Annual46.9 °F66.7 °F44.48 in.

Climate Data for Cahokia Illinois

Average First Frost DateNov. 1 - Nov. 10
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 ConditionsAbnormally Dry
Köppen Climate ClassificationCfa - Humid Subtropical Climate
2024 plantmaps.com