Mettawa Illinois Climate Data

Monthly Average Climate Data for Mettawa Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.7 °F31.0 °F2.03 in.
February19.5 °F34.6 °F2.02 in.
March28.5 °F45.0 °F2.3 in.
April38.8 °F56.6 °F3.87 in.
May49.5 °F68.0 °F4.42 in.
June59.6 °F78.3 °F4.45 in.
July65.2 °F82.8 °F3.86 in.
August64.0 °F81.2 °F3.86 in.
September56.2 °F74.5 °F3.61 in.
October44.2 °F62.0 °F3.3 in.
November32.7 °F47.9 °F2.44 in.
December22.8 °F36.3 °F2.11 in.
Annual41.5 °F58.2 °F38.27 in.

Climate Data for Mettawa Illinois

Average First Frost DateOct. 21 - Oct. 31
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 ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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