Royal Lakes Illinois Climate Data

Monthly Average Climate Data for Royal Lakes Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January21.0 °F36.7 °F2.48 in.
February24.5 °F42.1 °F2.19 in.
March33.4 °F52.9 °F3.17 in.
April44.0 °F65.0 °F4.67 in.
May55.0 °F74.7 °F5.03 in.
June64.0 °F83.3 °F4.22 in.
July67.3 °F86.3 °F3.81 in.
August65.3 °F85.3 °F3.54 in.
September56.9 °F79.6 °F3.29 in.
October45.4 °F67.6 °F3.26 in.
November34.8 °F53.2 °F3.38 in.
December25.9 °F41.6 °F2.56 in.
Annual44.8 °F64 °F41.6 in.

Climate Data for Royal Lakes Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 6b : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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