Lockport Illinois Climate Data

Monthly Average Climate Data for Lockport Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.4 °F31.7 °F2.15 in.
February19.2 °F35.7 °F1.99 in.
March28.7 °F47.5 °F2.54 in.
April39.1 °F60.5 °F3.95 in.
May50.0 °F71.4 °F4.85 in.
June60.1 °F80.9 °F4.71 in.
July64.1 °F84.5 °F4.32 in.
August62.8 °F82.7 °F4.24 in.
September54.9 °F76.9 °F3.34 in.
October42.8 °F63.9 °F3.47 in.
November32.0 °F49.3 °F2.47 in.
December22.1 °F36.9 °F2.19 in.
Annual41 °F60.2 °F40.22 in.

Climate Data for Lockport Illinois

Average First Frost DateOct. 11 - Oct. 20
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
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