Mount Morris Illinois Climate Data

Monthly Average Climate Data for Mount Morris Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.3 °F28.8 °F1.73 in.
February15.9 °F33.2 °F1.75 in.
March26.1 °F45.6 °F2.36 in.
April36.3 °F59.7 °F3.72 in.
May48.1 °F71.2 °F4.71 in.
June58.1 °F80.3 °F5.1 in.
July61.3 °F83.0 °F4.36 in.
August59.0 °F81.6 °F3.96 in.
September50.5 °F75.7 °F3.61 in.
October39.5 °F62.7 °F2.9 in.
November28.7 °F47.2 °F2.31 in.
December18.5 °F34.2 °F2.03 in.
Annual37.9 °F58.6 °F38.54 in.

Climate Data for Mount Morris Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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