Station information
- Integrated Surface Dataset (ISD) station ID: 997338
- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On August 4 in CHICAGO the average high temperature is 78.9 °F (26.1 °C). The lowest recored high temperature was 68.2 °F (20.1 °C) in 2020 and the highest recored high temperature was 86.2 °F (30.1 °C) in 2005. The high temperature is usually* between 75.6 °F (24.2 °C) and 82.3 °F (27.9 °C). About a quarter of the time, the high temperature is less than 75.6 °F (24.2 °C), and another quarter of the time, the high temperature is greater than and 82.3 °F (27.9 °C). About 95% of the time, the high temperature has been between 69.2 °F (20.7 °C) and 88.6 °F (31.5 °C).
Low Temperatures
On August 4 in CHICAGO the average low temperature is 70.9 °F (21.6 °C). The lowest recored low temperature was 57.9 °F (14.4 °C) in 2017 and the lowest recored low temperature was 80.1 °F (26.7 °C) in 2005. The low temperature is usually* between 68.1 °F (20.1 °C) and 73.8 °F (23.2 °C). About a quarter of the time, the low temperature is less than 68.1 °F (20.1 °C), and another quarter of the time, the low temperature is greater than and 73.8 °F (23.2 °C). About 95% of the time, the low temperature has been between 62.8 °F (17.1 °C) and 79.1 °F (26.2 °C).
Frost
On August 4 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