Station information
- Integrated Surface Dataset (ISD) station ID: 997338
- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On March 21 in CHICAGO the average high temperature is 48.2 °F (9.0 °C). The lowest recored high temperature was 30.4 °F (-0.9 °C) in 2013 and the highest recored high temperature was 74.1 °F (23.4 °C) in 2012. The high temperature is usually* between 39.7 °F (4.3 °C) and 56.8 °F (13.8 °C). About a quarter of the time, the high temperature is less than 39.7 °F (4.3 °C), and another quarter of the time, the high temperature is greater than and 56.8 °F (13.8 °C). About 95% of the time, the high temperature has been between 23.4 °F (-4.8 °C) and 73.0 °F (22.8 °C).
Low Temperatures
On March 21 in CHICAGO the average low temperature is 34.8 °F (1.5 °C). The lowest recored low temperature was 16.2 °F (-8.8 °C) in 2013 and the lowest recored low temperature was 58.1 °F (14.5 °C) in 2012. The low temperature is usually* between 29.6 °F (-1.4 °C) and 40.0 °F (4.4 °C). About a quarter of the time, the low temperature is less than 29.6 °F (-1.4 °C), and another quarter of the time, the low temperature is greater than and 40.0 °F (4.4 °C). About 95% of the time, the low temperature has been between 19.6 °F (-6.9 °C) and 49.9 °F (9.9 °C).
Frost
On March 21 in CHICAGO expect the temperatures to drop below freezing for a risk of frost about 36.0% 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