Station information
- Integrated Surface Dataset (ISD) station ID: 997338
- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On September 15 in CHICAGO the average high temperature is 71.9 °F (22.2 °C). The lowest recored high temperature was 55.8 °F (13.2 °C) in 2007 and the highest recored high temperature was 79.2 °F (26.2 °C) in 2019. The high temperature is usually* between 67.2 °F (19.5 °C) and 76.6 °F (24.8 °C). About a quarter of the time, the high temperature is less than 67.2 °F (19.5 °C), and another quarter of the time, the high temperature is greater than and 76.6 °F (24.8 °C). About 95% of the time, the high temperature has been between 58.2 °F (14.6 °C) and 85.6 °F (29.8 °C).
Low Temperatures
On September 15 in CHICAGO the average low temperature is 62.3 °F (16.8 °C). The lowest recored low temperature was 46.4 °F (8.0 °C) in 2007 and the lowest recored low temperature was 72.0 °F (22.2 °C) in 2024. The low temperature is usually* between 58.2 °F (14.6 °C) and 66.3 °F (19.1 °C). About a quarter of the time, the low temperature is less than 58.2 °F (14.6 °C), and another quarter of the time, the low temperature is greater than and 66.3 °F (19.1 °C). About 95% of the time, the low temperature has been between 50.5 °F (10.3 °C) and 74.0 °F (23.4 °C).
Frost
On September 15 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 2024