- 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 February 21 in CHICAGO O'HARE INTERNATIONAL the average high temperature is 39.7 °F (4.3 °C). The lowest recored high temperature was 6.1 °F (-14.4 °C) in 1963 and the highest recored high temperature was 70.0 °F (21.1 °C) in 2017. The high temperature is usually* between 32.4 °F (0.2 °C) and 47.1 °F (8.4 °C). About a quarter of the time, the high temperature is less than 32.4 °F (0.2 °C), and another quarter of the time, the high temperature is greater than and 47.1 °F (8.4 °C). About 95% of the time, the high temperature has been between 18.4 °F (-7.5 °C) and 61.0 °F (16.1 °C).
Low Temperatures
On February 21 in CHICAGO O'HARE INTERNATIONAL the average low temperature is 21.7 °F (-5.7 °C). The lowest recored low temperature was -8.0 °F (-22.2 °C) in 1963 and the lowest recored low temperature was 46.0 °F (7.8 °C) in 2024. The low temperature is usually* between 14.0 °F (-10.0 °C) and 29.3 °F (-1.5 °C). About a quarter of the time, the low temperature is less than 14.0 °F (-10.0 °C), and another quarter of the time, the low temperature is greater than and 29.3 °F (-1.5 °C). About 95% of the time, the low temperature has been between -0.5 °F (-18.0 °C) and 43.8 °F (6.6 °C).
Frost
On February 21 in CHICAGO O'HARE INTERNATIONAL expect the temperatures to drop below freezing for a risk of frost about 81.9% 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: