Cairo Illinois Climate Data

Monthly Average Climate Data for Cairo Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January27.0 °F43.3 °F3.95 in.
February29.8 °F48.3 °F3.91 in.
March37.7 °F58.1 °F4.97 in.
April47.7 °F69.4 °F5.18 in.
May58.1 °F78.4 °F5.3 in.
June66.4 °F86.5 °F4.18 in.
July69.8 °F89.1 °F3.94 in.
August67.2 °F87.8 °F2.85 in.
September59.0 °F82.1 °F3.44 in.
October47.2 °F71.4 °F3.93 in.
November37.3 °F57.7 °F4.29 in.
December30.3 °F46.7 °F4.33 in.
Annual48.1 °F68.2 °F50.27 in.

Climate Data for Cairo Illinois

Average First Frost DateNov. 11 - Nov. 20
Average Last Frost DateApr. 11 - Apr. 20
Average Days With Frost50-75 Days
Plant Hardiness Zone - 2023Zone 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 7a : 0°F to 5°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCfa - Humid Subtropical Climate
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