- Weather Bureau Army Navy (WBAN): 94846
- Country: US
- State: IL
- Latitude: 41.96
- Longitude: -87.932
An Integrated Surface Dataset (ISD) station ID was found for this station. Newer data may be available at the ISD page.
High Temperatures
On August 9 in CHICAGO O'HARE INTERNATIONAL the average high temperature is 84.2 °F (29.0 °C). The lowest recored high temperature was 68.0 °F (20.0 °C) in 1994 and the highest recored high temperature was 99.0 °F (37.2 °C) in 1988. The high temperature is usually* between 80.1 °F (26.7 °C) and 88.3 °F (31.3 °C). About a quarter of the time, the high temperature is less than 80.1 °F (26.7 °C), and another quarter of the time, the high temperature is greater than and 88.3 °F (31.3 °C). About 95% of the time, the high temperature has been between 72.4 °F (22.4 °C) and 96.0 °F (35.6 °C).
Low Temperatures
On August 9 in CHICAGO O'HARE INTERNATIONAL the average low temperature is 64.0 °F (17.8 °C). The lowest recored low temperature was 45.0 °F (7.2 °C) in 1964 and the lowest recored low temperature was 73.9 °F (23.3 °C) in 2025. The low temperature is usually* between 60.0 °F (15.5 °C) and 68.0 °F (20.0 °C). About a quarter of the time, the low temperature is less than 60.0 °F (15.5 °C), and another quarter of the time, the low temperature is greater than and 68.0 °F (20.0 °C). About 95% of the time, the low temperature has been between 52.3 °F (11.3 °C) and 75.7 °F (24.3 °C).
Frost
On August 9 in CHICAGO O'HARE INTERNATIONAL 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 O'HARE INTERNATIONAL — Integrated Surface Dataset (ISD) station ID: 725300 — Weather Bureau Army Navy (WBAN): 94846 — from year 1947 to 2025
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— Weather Bureau Army Navy (WBAN): 94846 — from year 1970 to 1972