Leaf River Illinois Climate Data

Monthly Average Climate Data for Leaf River Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.2 °F28.7 °F1.67 in.
February15.8 °F33.0 °F1.73 in.
March26.3 °F45.5 °F2.26 in.
April37.1 °F59.2 °F3.72 in.
May48.9 °F70.6 °F4.61 in.
June58.9 °F79.8 °F5.16 in.
July62.1 °F82.7 °F4.38 in.
August60.1 °F81.3 °F3.96 in.
September51.5 °F75.2 °F3.59 in.
October40.1 °F62.3 °F2.88 in.
November29.0 °F46.9 °F2.23 in.
December18.7 °F34.3 °F1.98 in.
Annual38.4 °F58.3 °F38.17 in.

Climate Data for Leaf River 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 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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