October 4 - Chicago - Weather History and Averages

High Temperatures

On October 4 in Chicago, IL (Illinois), USA the average high temperature is 68.8 °F (20.4 °C). The lowest recored high temperature was 48.0 °F (8.9 °C) in 2014 and the highest recored high temperature was 90.0 °F (32.2 °C) in 1951. The high temperature is usually* between 62.6 °F (17.0 °C) and 74.9 °F (23.9 °C). About a quarter of the time, the high temperature is less than 62.6 °F (17.0 °C), and another quarter of the time, the high temperature is greater than and 74.9 °F (23.9 °C). About 95% of the time, the high temperature has been between 50.9 °F (10.5 °C) and 86.7 °F (30.4 °C).

Low Temperatures

On October 4 in Chicago, IL (Illinois), USA the average low temperature is 50.8 °F (10.4 °C). The lowest recored low temperature was 30.9 °F (-0.6 °C) in 1987 and the lowest recored low temperature was 71.4 °F (21.9 °C) in 2023. The low temperature is usually* between 44.8 °F (7.1 °C) and 56.7 °F (13.7 °C). About a quarter of the time, the low temperature is less than 44.8 °F (7.1 °C), and another quarter of the time, the low temperature is greater than and 56.7 °F (13.7 °C). About 95% of the time, the low temperature has been between 33.5 °F (0.8 °C) and 68.1 °F (20.1 °C).

Frost

On October 4 in Chicago, IL (Illinois), USA expect the temperatures to drop below freezing for a risk of frost about 1.7% of the time.

Usually* in this context means around 50% of the time, assuming a normal distribution of values.

Data Source(s)

The data used to compute the average high/low temperatures for this location were taken from the following stations: