Omaha Illinois Climate Data

Monthly Average Climate Data for Omaha Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January24.8 °F41.2 °F3.57 in.
February27.4 °F46.3 °F3.1 in.
March35.5 °F55.9 °F4.33 in.
April45.6 °F67.7 °F5.0 in.
May56.2 °F76.7 °F5.15 in.
June64.6 °F85.1 °F4.45 in.
July67.7 °F87.9 °F4.03 in.
August65.5 °F87.0 °F3.02 in.
September58.0 °F81.9 °F3.17 in.
October46.3 °F70.2 °F3.38 in.
November36.0 °F56.4 °F4.01 in.
December28.4 °F45.6 °F3.73 in.
Annual46.3 °F66.8 °F46.94 in.

Climate Data for Omaha Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
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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