- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On May 31 in CHICAGO the average high temperature is 71.3 °F (21.8 °C). The lowest recored high temperature was 46.9 °F (8.3 °C) in 2015 and the highest recored high temperature was 84.9 °F (29.4 °C) in 2022. The high temperature is usually* between 64.2 °F (17.9 °C) and 78.4 °F (25.8 °C). About a quarter of the time, the high temperature is less than 64.2 °F (17.9 °C), and another quarter of the time, the high temperature is greater than and 78.4 °F (25.8 °C). About 95% of the time, the high temperature has been between 50.7 °F (10.4 °C) and 91.9 °F (33.3 °C).
Low Temperatures
On May 31 in CHICAGO the average low temperature is 58.4 °F (14.7 °C). The lowest recored low temperature was 42.4 °F (5.8 °C) in 2015 and the lowest recored low temperature was 75.9 °F (24.4 °C) in 2011. The low temperature is usually* between 53.5 °F (11.9 °C) and 63.4 °F (17.5 °C). About a quarter of the time, the low temperature is less than 53.5 °F (11.9 °C), and another quarter of the time, the low temperature is greater than and 63.4 °F (17.5 °C). About 95% of the time, the low temperature has been between 44.0 °F (6.7 °C) and 72.9 °F (22.7 °C).
Frost
On May 31 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