Chicago Illinois Climate Data

Monthly Average Climate Data for Chicago Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-6.4 °C0.6 °C60.45 mm
February-5 °C2.7 °C55.88 mm
March-0.1 °C7.9 °C57.66 mm
April5.4 °C14.1 °C100.84 mm
May11.2 °C19.9 °C117.86 mm
June16.9 °C25.2 °C113.28 mm
July20.4 °C27.4 °C103.63 mm
August19.8 °C27.1 °C102.87 mm
September15.7 °C23.5 °C84.07 mm
October8.8 °C16.9 °C95.76 mm
November2.4 °C9.7 °C70.1 mm
December-3.3 °C3.2 °C62.74 mm
Annual7.2 °C14.9 °C1025.14 mm

Climate Data for Chicago 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 6b : -20.6°C to -17.8°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
2024 plantmaps.com