- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On September 26 in CHICAGO the average high temperature is 70.7 °F (21.5 °C). The lowest recored high temperature was 57.2 °F (14.0 °C) in 2010 and the highest recored high temperature was 88.5 °F (31.4 °C) in 2017. The high temperature is usually* between 66.0 °F (18.9 °C) and 75.4 °F (24.1 °C). About a quarter of the time, the high temperature is less than 66.0 °F (18.9 °C), and another quarter of the time, the high temperature is greater than and 75.4 °F (24.1 °C). About 95% of the time, the high temperature has been between 57.1 °F (14.0 °C) and 84.2 °F (29.0 °C).
Low Temperatures
On September 26 in CHICAGO the average low temperature is 61.9 °F (16.6 °C). The lowest recored low temperature was 53.6 °F (12.0 °C) in 2022 and the lowest recored low temperature was 75.6 °F (24.2 °C) in 2017. The low temperature is usually* between 58.3 °F (14.6 °C) and 65.6 °F (18.6 °C). About a quarter of the time, the low temperature is less than 58.3 °F (14.6 °C), and another quarter of the time, the low temperature is greater than and 65.6 °F (18.6 °C). About 95% of the time, the low temperature has been between 51.3 °F (10.7 °C) and 72.5 °F (22.5 °C).
Frost
On September 26 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