- 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 18 in CHICAGO O'HARE INTERNATIONAL the average high temperature is 48.0 °F (8.9 °C). The lowest recored high temperature was 30.0 °F (-1.1 °C) in 2023 and the highest recored high temperature was 82.0 °F (27.8 °C) in 2012. The high temperature is usually* between 40.3 °F (4.6 °C) and 55.8 °F (13.2 °C). About a quarter of the time, the high temperature is less than 40.3 °F (4.6 °C), and another quarter of the time, the high temperature is greater than and 55.8 °F (13.2 °C). About 95% of the time, the high temperature has been between 25.5 °F (-3.6 °C) and 70.6 °F (21.4 °C).
Low Temperatures
On March 18 in CHICAGO O'HARE INTERNATIONAL the average low temperature is 29.1 °F (-1.6 °C). The lowest recored low temperature was 9.0 °F (-12.8 °C) in 1964 and the lowest recored low temperature was 57.0 °F (13.9 °C) in 2012. The low temperature is usually* between 23.2 °F (-4.9 °C) and 35.0 °F (1.7 °C). About a quarter of the time, the low temperature is less than 23.2 °F (-4.9 °C), and another quarter of the time, the low temperature is greater than and 35.0 °F (1.7 °C). About 95% of the time, the low temperature has been between 12.0 °F (-11.1 °C) and 46.3 °F (7.9 °C).
Frost
On March 18 in CHICAGO O'HARE INTERNATIONAL expect the temperatures to drop below freezing for a risk of frost about 62.9% 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:
- 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