Oreana Illinois Climate Data

Monthly Average Climate Data for Oreana Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January18.5 °F34.4 °F2.27 in.
February21.0 °F39.5 °F2.03 in.
March30.4 °F50.6 °F2.75 in.
April41.6 °F64.1 °F4.09 in.
May53.1 °F74.0 °F4.53 in.
June61.8 °F83.2 °F4.6 in.
July64.7 °F85.9 °F3.84 in.
August63.0 °F84.1 °F3.27 in.
September54.8 °F79.2 °F3.14 in.
October42.7 °F66.5 °F3.31 in.
November32.1 °F51.5 °F3.03 in.
December24.3 °F39.4 °F2.41 in.
Annual42.3 °F62.7 °F39.27 in.

Climate Data for Oreana 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 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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