Station information
- Integrated Surface Dataset (ISD) station ID: 997338
- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On April 20 in CHICAGO the average high temperature is 54.9 °F (12.7 °C). The lowest recored high temperature was 37.8 °F (3.2 °C) in 2013 and the highest recored high temperature was 76.5 °F (24.7 °C) in 2023. The high temperature is usually* between 47.2 °F (8.5 °C) and 62.5 °F (17.0 °C). About a quarter of the time, the high temperature is less than 47.2 °F (8.5 °C), and another quarter of the time, the high temperature is greater than and 62.5 °F (17.0 °C). About 95% of the time, the high temperature has been between 32.7 °F (0.4 °C) and 77.1 °F (25.1 °C).
Low Temperatures
On April 20 in CHICAGO the average low temperature is 41.5 °F (5.3 °C). The lowest recored low temperature was 31.5 °F (-0.3 °C) in 2013 and the lowest recored low temperature was 46.4 °F (8.0 °C) in 2016. The low temperature is usually* between 38.2 °F (3.4 °C) and 44.9 °F (7.2 °C). About a quarter of the time, the low temperature is less than 38.2 °F (3.4 °C), and another quarter of the time, the low temperature is greater than and 44.9 °F (7.2 °C). About 95% of the time, the low temperature has been between 31.7 °F (-0.2 °C) and 51.3 °F (10.7 °C).
Frost
On April 20 in CHICAGO expect the temperatures to drop below freezing for a risk of frost about 2.8% 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