- 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 20 in CHICAGO O'HARE INTERNATIONAL the average high temperature is 82.7 °F (28.1 °C). The lowest recored high temperature was 66.4 °F (19.1 °C) in 1950 and the highest recored high temperature was 99.0 °F (37.2 °C) in 1983. The high temperature is usually* between 78.3 °F (25.7 °C) and 87.1 °F (30.6 °C). About a quarter of the time, the high temperature is less than 78.3 °F (25.7 °C), and another quarter of the time, the high temperature is greater than and 87.1 °F (30.6 °C). About 95% of the time, the high temperature has been between 69.9 °F (21.0 °C) and 95.5 °F (35.3 °C).
Low Temperatures
On August 20 in CHICAGO O'HARE INTERNATIONAL the average low temperature is 61.9 °F (16.6 °C). The lowest recored low temperature was 44.4 °F (6.9 °C) in 1950 and the lowest recored low temperature was 79.3 °F (26.3 °C) in 1947. The low temperature is usually* between 57.2 °F (14.0 °C) and 66.7 °F (19.3 °C). About a quarter of the time, the low temperature is less than 57.2 °F (14.0 °C), and another quarter of the time, the low temperature is greater than and 66.7 °F (19.3 °C). About 95% of the time, the low temperature has been between 48.1 °F (8.9 °C) and 75.8 °F (24.3 °C).
Frost
On August 20 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