Mount Morris Illinois Climate Data

Monthly Average Climate Data for Mount Morris Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-10.9 °C-1.8 °C43.94 mm
February-8.9 °C0.7 °C44.45 mm
March-3.3 °C7.6 °C59.94 mm
April2.4 °C15.4 °C94.49 mm
May8.9 °C21.8 °C119.63 mm
June14.5 °C26.8 °C129.54 mm
July16.3 °C28.3 °C110.74 mm
August15 °C27.6 °C100.58 mm
September10.3 °C24.3 °C91.69 mm
October4.2 °C17.1 °C73.66 mm
November-1.8 °C8.4 °C58.67 mm
December-7.5 °C1.2 °C51.56 mm
Annual3.3 °C14.8 °C978.89 mm

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 : -26.1°C to -23.3°C
Plant Hardiness Zone - 2012Zone 5a : -28.9°C to -26.1°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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