- Integrated Surface Dataset (ISD) station ID: 725300
- Country: US
- State: IL
- Latitude: 41.96
- Longitude: -87.932
A Weather Bureau Army Navy (WBAN) station ID was found for this station. Older data may be available at the WBAN page.
High Temperatures
On September 17 in CHICAGO O'HARE INTERNATIONAL the average high temperature is 76.5 °F (24.7 °C). The lowest recored high temperature was 59.0 °F (15.0 °C) in 1981 and the highest recored high temperature was 90.3 °F (32.4 °C) in 1955. The high temperature is usually* between 71.3 °F (21.8 °C) and 81.7 °F (27.6 °C). About a quarter of the time, the high temperature is less than 71.3 °F (21.8 °C), and another quarter of the time, the high temperature is greater than and 81.7 °F (27.6 °C). About 95% of the time, the high temperature has been between 61.3 °F (16.3 °C) and 91.6 °F (33.1 °C).
Low Temperatures
On September 17 in CHICAGO O'HARE INTERNATIONAL the average low temperature is 54.5 °F (12.5 °C). The lowest recored low temperature was 37.0 °F (2.8 °C) in 1984 and the lowest recored low temperature was 70.0 °F (21.1 °C) in 2018. The low temperature is usually* between 49.2 °F (9.6 °C) and 59.8 °F (15.4 °C). About a quarter of the time, the low temperature is less than 49.2 °F (9.6 °C), and another quarter of the time, the low temperature is greater than and 59.8 °F (15.4 °C). About 95% of the time, the low temperature has been between 39.2 °F (4.0 °C) and 69.8 °F (21.0 °C).
Frost
On September 17 in CHICAGO O'HARE INTERNATIONAL expect the temperatures to drop below freezing for a risk of frost about 0.2% 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: