Rome Illinois Climate Data

Monthly Average Climate Data for Rome Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-8.7 °C0.4 °C52.32 mm
February-6.8 °C2.9 °C48.01 mm
March-1.3 °C9.8 °C63.75 mm
April4.6 °C17.3 °C95.5 mm
May10.8 °C23.3 °C125.48 mm
June16.2 °C28.3 °C104.65 mm
July18.2 °C29.9 °C90.93 mm
August17.1 °C29.2 °C92.96 mm
September12.5 °C26 °C87.38 mm
October6.1 °C18.9 °C74.42 mm
November-0.1 °C10.4 °C66.04 mm
December-5.4 °C3.3 °C52.32 mm
Annual5.3 °C16.6 °C953.76 mm

Climate Data for Rome Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6a : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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