Rome Illinois Climate Data

Monthly Average Climate Data for Rome Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.3 °F32.7 °F2.06 in.
February19.7 °F37.2 °F1.89 in.
March29.6 °F49.7 °F2.51 in.
April40.2 °F63.2 °F3.76 in.
May51.5 °F74.0 °F4.94 in.
June61.1 °F82.9 °F4.12 in.
July64.8 °F85.9 °F3.58 in.
August62.7 °F84.5 °F3.66 in.
September54.5 °F78.8 °F3.44 in.
October42.9 °F66.1 °F2.93 in.
November31.8 °F50.8 °F2.6 in.
December22.2 °F38.0 °F2.06 in.
Annual41.4 °F62 °F37.55 in.

Climate Data for Rome Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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