Station information
- Integrated Surface Dataset (ISD) station ID: 997338
- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On August 9 in CHICAGO the average high temperature is 79.7 °F (26.5 °C). The lowest recored high temperature was 69.1 °F (20.6 °C) in 2022 and the highest recored high temperature was 93.2 °F (34.0 °C) in 2025. The high temperature is usually* between 75.6 °F (24.2 °C) and 83.7 °F (28.7 °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 83.7 °F (28.7 °C). About 95% of the time, the high temperature has been between 68.0 °F (20.0 °C) and 91.4 °F (33.0 °C).
Low Temperatures
On August 9 in CHICAGO the average low temperature is 70.8 °F (21.5 °C). The lowest recored low temperature was 64.8 °F (18.2 °C) in 2024 and the lowest recored low temperature was 81.5 °F (27.5 °C) in 2025. The low temperature is usually* between 67.9 °F (19.9 °C) and 73.7 °F (23.2 °C). About a quarter of the time, the low temperature is less than 67.9 °F (19.9 °C), and another quarter of the time, the low temperature is greater than and 73.7 °F (23.2 °C). About 95% of the time, the low temperature has been between 62.3 °F (16.8 °C) and 79.2 °F (26.2 °C).
Frost
On August 9 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