Station information
- Integrated Surface Dataset (ISD) station ID: 997338
- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On October 18 in CHICAGO the average high temperature is 60.7 °F (15.9 °C). The lowest recored high temperature was 45.5 °F (7.5 °C) in 2022 and the highest recored high temperature was 79.5 °F (26.4 °C) in 2016. The high temperature is usually* between 54.7 °F (12.6 °C) and 66.6 °F (19.2 °C). About a quarter of the time, the high temperature is less than 54.7 °F (12.6 °C), and another quarter of the time, the high temperature is greater than and 66.6 °F (19.2 °C). About 95% of the time, the high temperature has been between 43.4 °F (6.4 °C) and 77.9 °F (25.5 °C).
Low Temperatures
On October 18 in CHICAGO the average low temperature is 49.7 °F (9.8 °C). The lowest recored low temperature was 36.0 °F (2.2 °C) in 2022 and the lowest recored low temperature was 63.9 °F (17.7 °C) in 2007. The low temperature is usually* between 45.1 °F (7.3 °C) and 54.3 °F (12.4 °C). About a quarter of the time, the low temperature is less than 45.1 °F (7.3 °C), and another quarter of the time, the low temperature is greater than and 54.3 °F (12.4 °C). About 95% of the time, the low temperature has been between 36.3 °F (2.4 °C) and 63.1 °F (17.3 °C).
Frost
On October 18 in CHICAGO expect the temperatures to drop below freezing for a risk of frost about 0.5% 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