- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On March 30 in CHICAGO the average high temperature is 50.1 °F (10.1 °C). The lowest recored high temperature was 35.1 °F (1.7 °C) in 2011 and the highest recored high temperature was 70.0 °F (21.1 °C) in 2025. The high temperature is usually* between 42.7 °F (5.9 °C) and 57.5 °F (14.2 °C). About a quarter of the time, the high temperature is less than 42.7 °F (5.9 °C), and another quarter of the time, the high temperature is greater than and 57.5 °F (14.2 °C). About 95% of the time, the high temperature has been between 28.6 °F (-1.9 °C) and 71.7 °F (22.0 °C).
Low Temperatures
On March 30 in CHICAGO the average low temperature is 37.4 °F (3.0 °C). The lowest recored low temperature was 30.2 °F (-1.0 °C) in 2023 and the lowest recored low temperature was 50.2 °F (10.1 °C) in 2021. The low temperature is usually* between 33.6 °F (0.9 °C) and 41.1 °F (5.1 °C). About a quarter of the time, the low temperature is less than 33.6 °F (0.9 °C), and another quarter of the time, the low temperature is greater than and 41.1 °F (5.1 °C). About 95% of the time, the low temperature has been between 26.5 °F (-3.1 °C) and 48.2 °F (9.0 °C).
Frost
On March 30 in CHICAGO expect the temperatures to drop below freezing for a risk of frost about 16.7% 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 2005 to 2025