- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On December 15 in CHICAGO the average high temperature is 39.2 °F (4.0 °C). The lowest recored high temperature was 14.7 °F (-9.6 °C) in 2016 and the highest recored high temperature was 60.6 °F (15.9 °C) in 2021. The high temperature is usually* between 31.4 °F (-0.4 °C) and 47.1 °F (8.4 °C). About a quarter of the time, the high temperature is less than 31.4 °F (-0.4 °C), and another quarter of the time, the high temperature is greater than and 47.1 °F (8.4 °C). About 95% of the time, the high temperature has been between 16.4 °F (-8.7 °C) and 62.1 °F (16.7 °C).
Low Temperatures
On December 15 in CHICAGO the average low temperature is 29.0 °F (-1.7 °C). The lowest recored low temperature was 2.5 °F (-16.4 °C) in 2016 and the lowest recored low temperature was 45.9 °F (7.7 °C) in 2021. The low temperature is usually* between 21.1 °F (-6.0 °C) and 36.9 °F (2.7 °C). About a quarter of the time, the low temperature is less than 21.1 °F (-6.0 °C), and another quarter of the time, the low temperature is greater than and 36.9 °F (2.7 °C). About 95% of the time, the low temperature has been between 6.2 °F (-14.4 °C) and 51.8 °F (11.0 °C).
Frost
On December 15 in CHICAGO expect the temperatures to drop below freezing for a risk of frost about 60.1% 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