- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On June 20 in CHICAGO the average high temperature is 77.6 °F (25.3 °C). The lowest recored high temperature was 56.7 °F (13.7 °C) in 2019 and the highest recored high temperature was 93.4 °F (34.1 °C) in 2024. The high temperature is usually* between 71.5 °F (22.0 °C) and 83.6 °F (28.7 °C). About a quarter of the time, the high temperature is less than 71.5 °F (22.0 °C), and another quarter of the time, the high temperature is greater than and 83.6 °F (28.7 °C). About 95% of the time, the high temperature has been between 60.0 °F (15.6 °C) and 95.1 °F (35.1 °C).
Low Temperatures
On June 20 in CHICAGO the average low temperature is 65.0 °F (18.3 °C). The lowest recored low temperature was 52.3 °F (11.3 °C) in 2019 and the lowest recored low temperature was 80.2 °F (26.8 °C) in 2016. The low temperature is usually* between 60.3 °F (15.7 °C) and 69.6 °F (20.9 °C). About a quarter of the time, the low temperature is less than 60.3 °F (15.7 °C), and another quarter of the time, the low temperature is greater than and 69.6 °F (20.9 °C). About 95% of the time, the low temperature has been between 51.4 °F (10.8 °C) and 78.5 °F (25.8 °C).
Frost
On June 20 in CHICAGO expect the temperatures to drop below freezing for a risk of frost about 0.0% 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 2005 to 2025