- 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 May 1 in CHICAGO O'HARE INTERNATIONAL the average high temperature is 66.9 °F (19.4 °C). The lowest recored high temperature was 46.9 °F (8.3 °C) in 1966 and the highest recored high temperature was 88.0 °F (31.1 °C) in 1992. The high temperature is usually* between 60.1 °F (15.6 °C) and 73.6 °F (23.1 °C). About a quarter of the time, the high temperature is less than 60.1 °F (15.6 °C), and another quarter of the time, the high temperature is greater than and 73.6 °F (23.1 °C). About 95% of the time, the high temperature has been between 47.2 °F (8.4 °C) and 86.5 °F (30.3 °C).
Low Temperatures
On May 1 in CHICAGO O'HARE INTERNATIONAL the average low temperature is 44.3 °F (6.8 °C). The lowest recored low temperature was 29.3 °F (-1.5 °C) in 1963 and the lowest recored low temperature was 64.9 °F (18.3 °C) in 2024. The low temperature is usually* between 39.1 °F (4.0 °C) and 49.4 °F (9.7 °C). About a quarter of the time, the low temperature is less than 39.1 °F (4.0 °C), and another quarter of the time, the low temperature is greater than and 49.4 °F (9.7 °C). About 95% of the time, the low temperature has been between 29.3 °F (-1.5 °C) and 59.2 °F (15.1 °C).
Frost
On May 1 in CHICAGO O'HARE INTERNATIONAL expect the temperatures to drop below freezing for a risk of frost about 5.4% 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: