Port Barrington Illinois Climate Data

Monthly Average Climate Data for Port Barrington Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-9.8 °C-1.2 °C47.75 mm
February-8.3 °C0.9 °C48.51 mm
March-2.9 °C7.2 °C56.64 mm
April2.8 °C14.3 °C96.27 mm
May8.8 °C20.7 °C122.94 mm
June14.5 °C26.2 °C124.21 mm
July17.2 °C28.5 °C101.09 mm
August16.4 °C27.3 °C101.35 mm
September11.9 °C23.6 °C88.9 mm
October5.2 °C16.4 °C80.52 mm
November-0.8 °C8.4 °C61.98 mm
December-6.4 °C1.8 °C52.58 mm
Annual4.1 °C14.5 °C982.74 mm

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 : -26.1°C to -23.3°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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