New Lenox Illinois Climate Data

Monthly Average Climate Data for New Lenox Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.6 °F31.9 °F2.14 in.
February19.2 °F35.8 °F2.08 in.
March28.8 °F47.4 °F2.44 in.
April39.3 °F60.4 °F3.89 in.
May50.0 °F71.3 °F4.71 in.
June60.1 °F80.9 °F4.61 in.
July64.5 °F84.6 °F4.57 in.
August63.0 °F82.7 °F4.14 in.
September55.3 °F76.9 °F3.42 in.
October43.0 °F63.6 °F3.38 in.
November32.3 °F49.3 °F2.49 in.
December22.2 °F37.0 °F2.18 in.
Annual41.2 °F60.2 °F40.05 in.

Climate Data for New Lenox Illinois

Average First Frost DateOct. 11 - Oct. 20
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