Station information
- Integrated Surface Dataset (ISD) station ID: 997338
- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On February 17 in CHICAGO the average high temperature is 35.1 °F (1.7 °C). The lowest recored high temperature was 18.9 °F (-7.3 °C) in 2015 and the highest recored high temperature was 63.7 °F (17.6 °C) in 2017. The high temperature is usually* between 26.8 °F (-2.9 °C) and 43.5 °F (6.4 °C). About a quarter of the time, the high temperature is less than 26.8 °F (-2.9 °C), and another quarter of the time, the high temperature is greater than and 43.5 °F (6.4 °C). About 95% of the time, the high temperature has been between 11.0 °F (-11.7 °C) and 59.3 °F (15.2 °C).
Low Temperatures
On February 17 in CHICAGO the average low temperature is 23.7 °F (-4.6 °C). The lowest recored low temperature was 4.3 °F (-15.4 °C) in 2025 and the lowest recored low temperature was 44.2 °F (6.8 °C) in 2011. The low temperature is usually* between 16.7 °F (-8.5 °C) and 30.7 °F (-0.7 °C). About a quarter of the time, the low temperature is less than 16.7 °F (-8.5 °C), and another quarter of the time, the low temperature is greater than and 30.7 °F (-0.7 °C). About 95% of the time, the low temperature has been between 3.3 °F (-15.9 °C) and 44.1 °F (6.7 °C).
Frost
On February 17 in CHICAGO expect the temperatures to drop below freezing for a risk of frost about 78.8% 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 2007 to 2025