- 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 March 21 in CHICAGO O'HARE INTERNATIONAL the average high temperature is 49.5 °F (9.7 °C). The lowest recored high temperature was 19.9 °F (-6.7 °C) in 1965 and the highest recored high temperature was 87.1 °F (30.6 °C) in 2012. The high temperature is usually* between 41.7 °F (5.4 °C) and 57.2 °F (14.0 °C). About a quarter of the time, the high temperature is less than 41.7 °F (5.4 °C), and another quarter of the time, the high temperature is greater than and 57.2 °F (14.0 °C). About 95% of the time, the high temperature has been between 26.9 °F (-2.9 °C) and 72.1 °F (22.3 °C).
Low Temperatures
On March 21 in CHICAGO O'HARE INTERNATIONAL the average low temperature is 29.9 °F (-1.1 °C). The lowest recored low temperature was 8.1 °F (-13.3 °C) in 1986 and the lowest recored low temperature was 61.0 °F (16.1 °C) in 2012. The low temperature is usually* between 23.8 °F (-4.5 °C) and 36.1 °F (2.3 °C). About a quarter of the time, the low temperature is less than 23.8 °F (-4.5 °C), and another quarter of the time, the low temperature is greater than and 36.1 °F (2.3 °C). About 95% of the time, the low temperature has been between 12.2 °F (-11.0 °C) and 47.7 °F (8.7 °C).
Frost
On March 21 in CHICAGO O'HARE INTERNATIONAL expect the temperatures to drop below freezing for a risk of frost about 59.0% 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