Markham Illinois Climate Data

Monthly Average Climate Data for Markham Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.2 °F32.0 °F2.21 in.
February19.9 °F35.8 °F2.07 in.
March29.2 °F46.7 °F2.4 in.
April39.4 °F59.4 °F3.91 in.
May50.3 °F70.2 °F4.53 in.
June60.3 °F80.1 °F4.55 in.
July65.3 °F84.1 °F4.43 in.
August63.4 °F82.3 °F4.16 in.
September56.1 °F76.1 °F3.22 in.
October43.9 °F63.3 °F3.45 in.
November33.1 °F49.2 °F2.68 in.
December23.1 °F37.2 °F2.27 in.
Annual41.8 °F59.7 °F39.88 in.

Climate Data for Markham Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
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
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