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Typical weather in Chicago, IL (Illinois), USA on October 20

High Temperatures

On October 20 in Chicago, IL (Illinois), USA the average high temperature is 62.3 °F (16.8 °C). The lowest recored high temperature was 37.9 °F (3.3 °C) in 1989 and the highest recored high temperature was 87.8 °F (31.0 °C) in 2003. The high temperature is usually* between 55.6 °F (13.1 °C) and 68.9 °F (20.5 °C). About a quarter of the time, the high temperature is less than 55.6 °F (13.1 °C), and another quarter of the time, the high temperature is greater than and 68.9 °F (20.5 °C). About 95% of the time, the high temperature has been between 42.9 °F (6.0 °C) and 81.7 °F (27.6 °C).

Low Temperatures

On October 20 in Chicago, IL (Illinois), USA the average low temperature is 44.5 °F (7.0 °C). The lowest recored low temperature was 21.0 °F (-6.1 °C) in 1992 and the lowest recored low temperature was 68.0 °F (20.0 °C) in 1979. The low temperature is usually* between 38.8 °F (3.8 °C) and 50.3 °F (10.2 °C). About a quarter of the time, the low temperature is less than 38.8 °F (3.8 °C), and another quarter of the time, the low temperature is greater than and 50.3 °F (10.2 °C). About 95% of the time, the low temperature has been between 27.8 °F (-2.4 °C) and 61.3 °F (16.3 °C).

Frost

On October 20 in Chicago, IL (Illinois), USA expect the temperatures to drop below freezing for a risk of frost about 7.2% 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: