Mokena Illinois Climate Data

Monthly Average Climate Data for Mokena Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.6 °F32.1 °F2.18 in.
February19.3 °F36.0 °F2.12 in.
March28.7 °F47.5 °F2.45 in.
April39.3 °F60.3 °F3.91 in.
May50.1 °F71.2 °F4.72 in.
June60.1 °F80.9 °F4.59 in.
July64.7 °F84.8 °F4.58 in.
August63.1 °F82.9 °F4.16 in.
September55.3 °F76.9 °F3.42 in.
October43.0 °F63.5 °F3.42 in.
November32.5 °F49.5 °F2.53 in.
December22.2 °F37.1 °F2.21 in.
Annual41.2 °F60.2 °F40.29 in.

Climate Data for Mokena 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 ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation