Station information
- Integrated Surface Dataset (ISD) station ID: 997338
- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On August 13 in CHICAGO the average high temperature is 77.1 °F (25.0 °C). The lowest recored high temperature was 70.7 °F (21.5 °C) in 2013 and the highest recored high temperature was 82.6 °F (28.1 °C) in 2010. The high temperature is usually* between 73.3 °F (22.9 °C) and 80.8 °F (27.1 °C). About a quarter of the time, the high temperature is less than 73.3 °F (22.9 °C), and another quarter of the time, the high temperature is greater than and 80.8 °F (27.1 °C). About 95% of the time, the high temperature has been between 66.2 °F (19.0 °C) and 87.9 °F (31.1 °C).
Low Temperatures
On August 13 in CHICAGO the average low temperature is 69.8 °F (21.0 °C). The lowest recored low temperature was 62.6 °F (17.0 °C) in 2014 and the lowest recored low temperature was 78.1 °F (25.6 °C) in 2025. The low temperature is usually* between 66.9 °F (19.4 °C) and 72.7 °F (22.6 °C). About a quarter of the time, the low temperature is less than 66.9 °F (19.4 °C), and another quarter of the time, the low temperature is greater than and 72.7 °F (22.6 °C). About 95% of the time, the low temperature has been between 61.3 °F (16.3 °C) and 78.2 °F (25.7 °C).
Frost
On August 13 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