- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On July 17 in CHICAGO the average high temperature is 80.8 °F (27.1 °C). The lowest recored high temperature was 68.4 °F (20.2 °C) in 2017 and the highest recored high temperature was 93.9 °F (34.4 °C) in 2012. The high temperature is usually* between 75.3 °F (24.1 °C) and 86.3 °F (30.2 °C). About a quarter of the time, the high temperature is less than 75.3 °F (24.1 °C), and another quarter of the time, the high temperature is greater than and 86.3 °F (30.2 °C). About 95% of the time, the high temperature has been between 64.9 °F (18.3 °C) and 96.7 °F (36.0 °C).
Low Temperatures
On July 17 in CHICAGO the average low temperature is 70.9 °F (21.6 °C). The lowest recored low temperature was 61.3 °F (16.3 °C) in 2009 and the lowest recored low temperature was 82.4 °F (28.0 °C) in 2012. The low temperature is usually* between 67.2 °F (19.5 °C) and 74.7 °F (23.7 °C). About a quarter of the time, the low temperature is less than 67.2 °F (19.5 °C), and another quarter of the time, the low temperature is greater than and 74.7 °F (23.7 °C). About 95% of the time, the low temperature has been between 60.1 °F (15.6 °C) and 81.8 °F (27.6 °C).
Frost
On July 17 in CHICAGO expect the temperatures to drop below freezing for a risk of frost about 0.0% 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 2025