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Typical weather in Chicago, IL (Illinois), USA on October 9

High Temperatures

On October 9 in Chicago, IL (Illinois), USA the average high temperature is 66.5 °F (19.2 °C). The lowest recored high temperature was 44.1 °F (6.7 °C) in 1964 and the highest recored high temperature was 87.8 °F (31.0 °C) in 2010. The high temperature is usually* between 60.4 °F (15.8 °C) and 72.7 °F (22.6 °C). About a quarter of the time, the high temperature is less than 60.4 °F (15.8 °C), and another quarter of the time, the high temperature is greater than and 72.7 °F (22.6 °C). About 95% of the time, the high temperature has been between 48.6 °F (9.2 °C) and 84.5 °F (29.1 °C).

Low Temperatures

On October 9 in Chicago, IL (Illinois), USA the average low temperature is 48.6 °F (9.2 °C). The lowest recored low temperature was 24.4 °F (-4.2 °C) in 1964 and the lowest recored low temperature was 71.6 °F (22.0 °C) in 2018. The low temperature is usually* between 42.8 °F (6.0 °C) and 54.4 °F (12.4 °C). About a quarter of the time, the low temperature is less than 42.8 °F (6.0 °C), and another quarter of the time, the low temperature is greater than and 54.4 °F (12.4 °C). About 95% of the time, the low temperature has been between 31.8 °F (-0.1 °C) and 65.4 °F (18.5 °C).

Frost

On October 9 in Chicago, IL (Illinois), USA expect the temperatures to drop below freezing for a risk of frost about 2.6% 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: