December - CHICAGO - Weather History and Averages

High Temperatures

On average, the day in December with the warmest high temperature in CHICAGO is December 1 at an average of 42.5 °F (5.8 °C).

On average, the day in December with the coldest high temperature in CHICAGO is December 18 at an average of 34.0 °F (1.1 °C).

The warmest recorded high temperature in December in CHICAGO was 67.5 °F (19.7 °C) on December 3 in the year 2012 at CHICAGO — Integrated Surface Dataset (ISD) station ID: 997338 .

The coldest recorded high temperature in December in CHICAGO was 3.0 °F (-16.1 °C) on December 22 in the year 2008 at CHICAGO — Integrated Surface Dataset (ISD) station ID: 997338 .

On average, the day in December with the warmest low temperature in CHICAGO is December 1 at an average of 32.2 °F (0.1 °C).

On average, the day in December with the coldest low temperature in CHICAGO is December 18 at an average of 25.4 °F (-3.7 °C).

The warmest recorded low temperature in CHICAGO was 50.9 °F (10.5 °C) on December 26 in the year 2019 at CHICAGO — Integrated Surface Dataset (ISD) station ID: 997338 .

The coldest recorded low temperature in CHICAGO was -7.2 °F (-21.8 °C) on December 23 in the year 2022 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: