South Holland Illinois Climate Data

Monthly Average Climate Data for South Holland Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.6 °F32.2 °F2.21 in.
February20.2 °F35.9 °F2.1 in.
March29.4 °F46.3 °F2.38 in.
April39.6 °F59.2 °F3.88 in.
May50.5 °F69.9 °F4.43 in.
June60.5 °F79.8 °F4.62 in.
July65.3 °F83.8 °F4.35 in.
August63.5 °F82.0 °F4.13 in.
September56.0 °F76.1 °F3.24 in.
October43.9 °F63.3 °F3.49 in.
November33.2 °F49.4 °F2.72 in.
December23.1 °F37.3 °F2.29 in.
Annual41.9 °F59.6 °F39.84 in.

Climate Data for South Holland 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 6a : -10°F to -5°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation