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Typical weather in Chicago, IL (Illinois), USA on October 17

High Temperatures

On October 17 in Chicago, IL (Illinois), USA the average high temperature is 63.4 °F (17.4 °C). The lowest recored high temperature was 43.0 °F (6.1 °C) in 1948 and the highest recored high temperature was 86.0 °F (30.0 °C) in 1950. The high temperature is usually* between 56.8 °F (13.8 °C) and 70.0 °F (21.1 °C). About a quarter of the time, the high temperature is less than 56.8 °F (13.8 °C), and another quarter of the time, the high temperature is greater than and 70.0 °F (21.1 °C). About 95% of the time, the high temperature has been between 44.3 °F (6.8 °C) and 82.5 °F (28.0 °C).

Low Temperatures

On October 17 in Chicago, IL (Illinois), USA the average low temperature is 45.8 °F (7.7 °C). The lowest recored low temperature was 28.0 °F (-2.2 °C) in 1992 and the lowest recored low temperature was 70.0 °F (21.1 °C) in 1968. The low temperature is usually* between 40.0 °F (4.5 °C) and 51.7 °F (10.9 °C). About a quarter of the time, the low temperature is less than 40.0 °F (4.5 °C), and another quarter of the time, the low temperature is greater than and 51.7 °F (10.9 °C). About 95% of the time, the low temperature has been between 28.9 °F (-1.7 °C) and 62.8 °F (17.1 °C).

Frost

On October 17 in Chicago, IL (Illinois), USA expect the temperatures to drop below freezing for a risk of frost about 5.4% 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: