Lake Bluff Illinois Climate Data

Monthly Average Climate Data for Lake Bluff Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.0 °F30.9 °F2.12 in.
February19.8 °F34.3 °F2.06 in.
March28.6 °F43.8 °F2.28 in.
April38.5 °F54.5 °F4.15 in.
May48.3 °F65.6 °F4.68 in.
June58.5 °F75.7 °F4.26 in.
July65.3 °F80.9 °F4.0 in.
August64.9 °F79.4 °F3.93 in.
September57.1 °F73.1 °F4.02 in.
October45.1 °F61.2 °F3.37 in.
November33.6 °F47.8 °F2.71 in.
December23.0 °F36.3 °F2.07 in.
Annual41.6 °F57 °F39.65 in.

Climate Data for Lake Bluff 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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