Lake Zurich Illinois Climate Data

Monthly Average Climate Data for Lake Zurich Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.5 °F30.2 °F1.93 in.
February17.3 °F34.0 °F1.95 in.
March26.6 °F45.6 °F2.31 in.
April36.9 °F58.0 °F3.83 in.
May47.7 °F69.2 °F4.71 in.
June57.7 °F79.3 °F4.6 in.
July62.9 °F83.6 °F3.85 in.
August61.4 °F81.4 °F3.98 in.
September53.5 °F74.5 °F3.44 in.
October41.7 °F61.7 °F3.24 in.
November30.6 °F47.5 °F2.42 in.
December20.5 °F35.3 °F2.11 in.
Annual39.3 °F58.4 °F38.37 in.

Climate Data for Lake Zurich Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°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