Station information
- Integrated Surface Dataset (ISD) station ID: 997338
- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On March 18 in CHICAGO the average high temperature is 47.8 °F (8.8 °C). The lowest recored high temperature was 31.3 °F (-0.4 °C) in 2023 and the highest recored high temperature was 70.7 °F (21.5 °C) in 2012. The high temperature is usually* between 39.2 °F (4.0 °C) and 56.3 °F (13.5 °C). About a quarter of the time, the high temperature is less than 39.2 °F (4.0 °C), and another quarter of the time, the high temperature is greater than and 56.3 °F (13.5 °C). About 95% of the time, the high temperature has been between 23.0 °F (-5.0 °C) and 72.6 °F (22.5 °C).
Low Temperatures
On March 18 in CHICAGO the average low temperature is 35.7 °F (2.0 °C). The lowest recored low temperature was 13.1 °F (-10.5 °C) in 2023 and the lowest recored low temperature was 57.7 °F (14.3 °C) in 2012. The low temperature is usually* between 30.0 °F (-1.1 °C) and 41.3 °F (5.1 °C). About a quarter of the time, the low temperature is less than 30.0 °F (-1.1 °C), and another quarter of the time, the low temperature is greater than and 41.3 °F (5.1 °C). About 95% of the time, the low temperature has been between 19.4 °F (-7.0 °C) and 51.9 °F (11.1 °C).
Frost
On March 18 in CHICAGO expect the temperatures to drop below freezing for a risk of frost about 33.0% 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 — Integrated Surface Dataset (ISD) station ID: 997338 — from year 2007 to 2025