- 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 April 21 in CHICAGO O'HARE INTERNATIONAL the average high temperature is 63.7 °F (17.6 °C). The lowest recored high temperature was 46.4 °F (8.0 °C) in 1947 and the highest recored high temperature was 88.0 °F (31.1 °C) in 1985. The high temperature is usually* between 56.7 °F (13.7 °C) and 70.7 °F (21.5 °C). About a quarter of the time, the high temperature is less than 56.7 °F (13.7 °C), and another quarter of the time, the high temperature is greater than and 70.7 °F (21.5 °C). About 95% of the time, the high temperature has been between 43.3 °F (6.3 °C) and 84.1 °F (28.9 °C).
Low Temperatures
On April 21 in CHICAGO O'HARE INTERNATIONAL the average low temperature is 41.4 °F (5.2 °C). The lowest recored low temperature was 27.0 °F (-2.8 °C) in 1983 and the lowest recored low temperature was 64.0 °F (17.8 °C) in 1977. The low temperature is usually* between 35.9 °F (2.2 °C) and 47.0 °F (8.3 °C). About a quarter of the time, the low temperature is less than 35.9 °F (2.2 °C), and another quarter of the time, the low temperature is greater than and 47.0 °F (8.3 °C). About 95% of the time, the low temperature has been between 25.3 °F (-3.7 °C) and 57.6 °F (14.2 °C).
Frost
On April 21 in CHICAGO O'HARE INTERNATIONAL expect the temperatures to drop below freezing for a risk of frost about 12.6% 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
-
— Weather Bureau Army Navy (WBAN): 94846 — from year 1970 to 1972