Station information
- Integrated Surface Dataset (ISD) station ID: 997338
- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On May 17 in CHICAGO the average high temperature is 64.0 °F (17.8 °C). The lowest recored high temperature was 45.5 °F (7.5 °C) in 2011 and the highest recored high temperature was 84.4 °F (29.1 °C) in 2017. The high temperature is usually* between 56.4 °F (13.6 °C) and 71.6 °F (22.0 °C). About a quarter of the time, the high temperature is less than 56.4 °F (13.6 °C), and another quarter of the time, the high temperature is greater than and 71.6 °F (22.0 °C). About 95% of the time, the high temperature has been between 41.9 °F (5.5 °C) and 86.1 °F (30.1 °C).
Low Temperatures
On May 17 in CHICAGO the average low temperature is 51.2 °F (10.7 °C). The lowest recored low temperature was 40.3 °F (4.6 °C) in 2014 and the lowest recored low temperature was 67.5 °F (19.7 °C) in 2017. The low temperature is usually* between 46.4 °F (8.0 °C) and 56.0 °F (13.3 °C). About a quarter of the time, the low temperature is less than 46.4 °F (8.0 °C), and another quarter of the time, the low temperature is greater than and 56.0 °F (13.3 °C). About 95% of the time, the low temperature has been between 37.4 °F (3.0 °C) and 65.1 °F (18.4 °C).
Frost
On May 17 in CHICAGO expect the temperatures to drop below freezing for a risk of frost about 0.3% 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