Station information
- Integrated Surface Dataset (ISD) station ID: 997338
- Country: US
- State: IL
- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On October 15 in CHICAGO the average high temperature is 61.5 °F (16.4 °C). The lowest recored high temperature was 47.1 °F (8.4 °C) in 2009 and the highest recored high temperature was 77.0 °F (25.0 °C) in 2020. The high temperature is usually* between 56.4 °F (13.6 °C) and 66.5 °F (19.2 °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 66.5 °F (19.2 °C). About 95% of the time, the high temperature has been between 46.8 °F (8.2 °C) and 76.1 °F (24.5 °C).
Low Temperatures
On October 15 in CHICAGO the average low temperature is 50.7 °F (10.4 °C). The lowest recored low temperature was 39.9 °F (4.4 °C) in 2022 and the lowest recored low temperature was 59.2 °F (15.1 °C) in 2021. The low temperature is usually* between 46.6 °F (8.1 °C) and 54.8 °F (12.6 °C). About a quarter of the time, the low temperature is less than 46.6 °F (8.1 °C), and another quarter of the time, the low temperature is greater than and 54.8 °F (12.6 °C). About 95% of the time, the low temperature has been between 38.8 °F (3.8 °C) and 62.5 °F (17.0 °C).
Frost
On October 15 in CHICAGO expect the temperatures to drop below freezing for a risk of frost about 0.1% 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