Port Barrington Illinois Climate Data

Monthly Average Climate Data for Port Barrington Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.3 °F29.9 °F1.88 in.
February17.1 °F33.7 °F1.91 in.
March26.8 °F44.9 °F2.23 in.
April37.0 °F57.8 °F3.79 in.
May47.9 °F69.2 °F4.84 in.
June58.1 °F79.1 °F4.89 in.
July62.9 °F83.3 °F3.98 in.
August61.5 °F81.2 °F3.99 in.
September53.4 °F74.5 °F3.5 in.
October41.4 °F61.5 °F3.17 in.
November30.6 °F47.2 °F2.44 in.
December20.5 °F35.2 °F2.07 in.
Annual39.3 °F58.1 °F38.69 in.

Climate Data for Port Barrington Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°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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