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Typical weather in Chicago, IL (Illinois), USA on December 15

High Temperatures

On December 15 in Chicago, IL (Illinois), USA the average high temperature is 37.3 °F (2.9 °C). The lowest recored high temperature was 6.3 °F (-14.3 °C) in 1989 and the highest recored high temperature was 66.0 °F (18.9 °C) in 2021. The high temperature is usually* between 29.8 °F (-1.2 °C) and 44.7 °F (7.1 °C). About a quarter of the time, the high temperature is less than 29.8 °F (-1.2 °C), and another quarter of the time, the high temperature is greater than and 44.7 °F (7.1 °C). About 95% of the time, the high temperature has been between 15.6 °F (-9.1 °C) and 58.9 °F (14.9 °C).

Low Temperatures

On December 15 in Chicago, IL (Illinois), USA the average low temperature is 24.5 °F (-4.2 °C). The lowest recored low temperature was -9.0 °F (-22.8 °C) in 1958 and the lowest recored low temperature was 51.1 °F (10.6 °C) in 2021. The low temperature is usually* between 16.3 °F (-8.7 °C) and 32.6 °F (0.3 °C). About a quarter of the time, the low temperature is less than 16.3 °F (-8.7 °C), and another quarter of the time, the low temperature is greater than and 32.6 °F (0.3 °C). About 95% of the time, the low temperature has been between 0.8 °F (-17.3 °C) and 48.1 °F (8.9 °C).

Frost

On December 15 in Chicago, IL (Illinois), USA expect the temperatures to drop below freezing for a risk of frost about 73.4% of the time.

Data Source(s)

The data used to compute the average high/low temperatures for this location were taken from the following stations: