Omaha Illinois Climate Data

Monthly Average Climate Data for Omaha Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-4 °C5.1 °C90.68 mm
February-2.6 °C7.9 °C78.74 mm
March1.9 °C13.3 °C109.98 mm
April7.6 °C19.8 °C127 mm
May13.4 °C24.8 °C130.81 mm
June18.1 °C29.5 °C113.03 mm
July19.8 °C31.1 °C102.36 mm
August18.6 °C30.6 °C76.71 mm
September14.4 °C27.7 °C80.52 mm
October7.9 °C21.2 °C85.85 mm
November2.2 °C13.6 °C101.85 mm
December-2 °C7.6 °C94.74 mm
Annual7.9 °C19.4 °C1192.27 mm

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 : -17.8°C to -15°C
Plant Hardiness Zone - 2012Zone 6b : -20.6°C to -17.8°C
Current Drought ConditionsNormal
Köppen Climate ClassificationCfa - Humid Subtropical Climate
2024 plantmaps.com