Gurnee Illinois Climate Data

Monthly Average Climate Data for Gurnee Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.9 °F30.5 °F2.09 in.
February18.7 °F33.9 °F2.07 in.
March27.8 °F43.9 °F2.24 in.
April37.8 °F54.9 °F3.72 in.
May48.4 °F66.2 °F4.33 in.
June58.6 °F76.3 °F4.27 in.
July64.2 °F81.2 °F3.48 in.
August63.3 °F79.9 °F3.54 in.
September55.4 °F73.3 °F3.45 in.
October43.5 °F61.0 °F3.17 in.
November32.2 °F47.5 °F2.48 in.
December22.2 °F35.8 °F2.17 in.
Annual40.7 °F57 °F37.01 in.

Climate Data for Gurnee Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 11 - May 20
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