September 28 - Chicago - Weather History and Averages

High Temperatures

On September 28 in Chicago, IL (Illinois), USA the average high temperature is 70.2 °F (21.2 °C). The lowest recored high temperature was 48.9 °F (9.4 °C) in 1967 and the highest recored high temperature was 91.9 °F (33.3 °C) in 1953. The high temperature is usually* between 64.7 °F (18.2 °C) and 75.7 °F (24.3 °C). About a quarter of the time, the high temperature is less than 64.7 °F (18.2 °C), and another quarter of the time, the high temperature is greater than and 75.7 °F (24.3 °C). About 95% of the time, the high temperature has been between 54.2 °F (12.4 °C) and 86.2 °F (30.1 °C).

Low Temperatures

On September 28 in Chicago, IL (Illinois), USA the average low temperature is 52.3 °F (11.3 °C). The lowest recored low temperature was 32.4 °F (0.2 °C) in 1964 and the lowest recored low temperature was 73.9 °F (23.3 °C) in 1971. The low temperature is usually* between 47.3 °F (8.5 °C) and 57.2 °F (14.0 °C). About a quarter of the time, the low temperature is less than 47.3 °F (8.5 °C), and another quarter of the time, the low temperature is greater than and 57.2 °F (14.0 °C). About 95% of the time, the low temperature has been between 37.8 °F (3.2 °C) and 66.7 °F (19.3 °C).

Frost

On September 28 in Chicago, IL (Illinois), USA expect the temperatures to drop below freezing for a risk of frost about 0.3% 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: