Oak Forest Illinois Climate Data

Monthly Average Climate Data for Oak Forest Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.1 °F32.0 °F2.2 in.
February19.9 °F35.9 °F2.08 in.
March29.1 °F47.1 °F2.4 in.
April39.5 °F59.6 °F3.93 in.
May50.3 °F70.5 °F4.6 in.
June60.3 °F80.4 °F4.47 in.
July65.0 °F84.4 °F4.42 in.
August63.3 °F82.6 °F4.17 in.
September55.9 °F76.3 °F3.24 in.
October43.7 °F63.3 °F3.46 in.
November32.7 °F49.2 °F2.65 in.
December22.8 °F37.1 °F2.27 in.
Annual41.6 °F59.9 °F39.89 in.

Climate Data for Oak Forest 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 ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
2024 plantmaps.com