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Typical weather in Chicago, IL (Illinois), USA on September 11

High Temperatures

On September 11 in Chicago, IL (Illinois), USA the average high temperature is 77.9 °F (25.5 °C). The lowest recored high temperature was 63.0 °F (17.2 °C) in 1965 and the highest recored high temperature was 96.1 °F (35.6 °C) in 2013. The high temperature is usually* between 72.6 °F (22.6 °C) and 83.2 °F (28.4 °C). About a quarter of the time, the high temperature is less than 72.6 °F (22.6 °C), and another quarter of the time, the high temperature is greater than and 83.2 °F (28.4 °C). About 95% of the time, the high temperature has been between 62.6 °F (17.0 °C) and 93.2 °F (34.0 °C).

Low Temperatures

On September 11 in Chicago, IL (Illinois), USA the average low temperature is 59.7 °F (15.4 °C). The lowest recored low temperature was 42.1 °F (5.6 °C) in 1993 and the lowest recored low temperature was 76.1 °F (24.5 °C) in 2013. The low temperature is usually* between 54.9 °F (12.7 °C) and 64.6 °F (18.1 °C). About a quarter of the time, the low temperature is less than 54.9 °F (12.7 °C), and another quarter of the time, the low temperature is greater than and 64.6 °F (18.1 °C). About 95% of the time, the low temperature has been between 45.6 °F (7.6 °C) and 73.9 °F (23.3 °C).

Frost

On September 11 in Chicago, IL (Illinois), USA expect the temperatures to drop below freezing for a risk of frost about 0.0% 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: