Station information
- Integrated Surface Dataset (ISD) station ID: 997338
- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On July 15 in CHICAGO the average high temperature is 80.3 °F (26.9 °C). The lowest recored high temperature was 63.1 °F (17.3 °C) in 2015 and the highest recored high temperature was 88.0 °F (31.1 °C) in 2019. The high temperature is usually* between 75.7 °F (24.3 °C) and 85.0 °F (29.4 °C). About a quarter of the time, the high temperature is less than 75.7 °F (24.3 °C), and another quarter of the time, the high temperature is greater than and 85.0 °F (29.4 °C). About 95% of the time, the high temperature has been between 66.9 °F (19.4 °C) and 93.8 °F (34.3 °C).
Low Temperatures
On July 15 in CHICAGO the average low temperature is 69.8 °F (21.0 °C). The lowest recored low temperature was 56.8 °F (13.8 °C) in 2014 and the lowest recored low temperature was 80.4 °F (26.9 °C) in 2025. The low temperature is usually* between 66.4 °F (19.1 °C) and 73.2 °F (22.9 °C). About a quarter of the time, the low temperature is less than 66.4 °F (19.1 °C), and another quarter of the time, the low temperature is greater than and 73.2 °F (22.9 °C). About 95% of the time, the low temperature has been between 60.0 °F (15.6 °C) and 79.6 °F (26.5 °C).
Frost
On July 15 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