- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On December 9 in CHICAGO the average high temperature is 37.2 °F (2.9 °C). The lowest recored high temperature was 25.7 °F (-3.5 °C) in 2010 and the highest recored high temperature was 54.7 °F (12.6 °C) in 2024. The high temperature is usually* between 30.8 °F (-0.7 °C) and 43.7 °F (6.5 °C). About a quarter of the time, the high temperature is less than 30.8 °F (-0.7 °C), and another quarter of the time, the high temperature is greater than and 43.7 °F (6.5 °C). About 95% of the time, the high temperature has been between 18.4 °F (-7.5 °C) and 56.1 °F (13.4 °C).
Low Temperatures
On December 9 in CHICAGO the average low temperature is 27.7 °F (-2.4 °C). The lowest recored low temperature was 15.8 °F (-9.0 °C) in 2013 and the lowest recored low temperature was 46.2 °F (7.9 °C) in 2024. The low temperature is usually* between 20.5 °F (-6.4 °C) and 34.9 °F (1.6 °C). About a quarter of the time, the low temperature is less than 20.5 °F (-6.4 °C), and another quarter of the time, the low temperature is greater than and 34.9 °F (1.6 °C). About 95% of the time, the low temperature has been between 6.9 °F (-14.0 °C) and 48.6 °F (9.2 °C).
Frost
On December 9 in CHICAGO expect the temperatures to drop below freezing for a risk of frost about 65.6% of the time.
Data Source(s)
The data used to compute the average high/low temperatures for this location were taken from the following stations:
- CHICAGO — Integrated Surface Dataset (ISD) station ID: 997338 — from year 2005 to 2024