North Chicago Illinois Climate Data

Monthly Average Climate Data for North Chicago Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.7 °F30.8 °F2.12 in.
February19.4 °F34.1 °F2.04 in.
March28.3 °F43.5 °F2.15 in.
April38.2 °F54.2 °F3.85 in.
May48.3 °F65.1 °F4.43 in.
June58.4 °F75.1 °F4.23 in.
July64.8 °F80.4 °F3.7 in.
August64.5 °F79.2 °F3.75 in.
September56.7 °F72.9 °F3.47 in.
October44.7 °F61.0 °F3.21 in.
November33.1 °F47.7 °F2.52 in.
December22.8 °F36.1 °F2.07 in.
Annual41.3 °F56.7 °F37.54 in.

Climate Data for North Chicago Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
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