October - CHICAGO - Weather History and Averages

High Temperatures

On average, the day in October with the warmest high temperature in CHICAGO is October 6 at an average of 67.2 °F (19.5 °C).

On average, the day in October with the coldest high temperature in CHICAGO is October 28 at an average of 54.5 °F (12.5 °C).

The warmest recorded high temperature in October in CHICAGO was 84.7 °F (29.3 °C) on October 2 in the year 2019 at CHICAGO — Integrated Surface Dataset (ISD) station ID: 997338 .

The coldest recorded high temperature in October in CHICAGO was 38.5 °F (3.6 °C) on October 27 in the year 2020 at CHICAGO — Integrated Surface Dataset (ISD) station ID: 997338 .

On average, the day in October with the warmest low temperature in CHICAGO is October 1 at an average of 58.0 °F (14.4 °C).

On average, the day in October with the coldest low temperature in CHICAGO is October 31 at an average of 44.4 °F (6.9 °C).

The warmest recorded low temperature in CHICAGO was 72.5 °F (22.5 °C) on October 1 in the year 2019 at CHICAGO — Integrated Surface Dataset (ISD) station ID: 997338 .

The coldest recorded low temperature in CHICAGO was 31.5 °F (-0.3 °C) on October 12 in the year 2006 at CHICAGO — Integrated Surface Dataset (ISD) station ID: 997338 .

If you would like to see the temperatures for specific days, you can click on the corresponding links below: