December 9 - Chicago - Weather History and Averages

High Temperatures

On December 9 in Chicago, IL (Illinois), USA the average high temperature is 37.9 °F (3.3 °C). The lowest recored high temperature was 3.4 °F (-15.9 °C) in 1958 and the highest recored high temperature was 62.1 °F (16.7 °C) in 1991. The high temperature is usually* between 30.8 °F (-0.7 °C) and 45.0 °F (7.2 °C). About a quarter of the time, the high temperature is less than 30.8 °F (-0.7 °C), and another quarter of the time, the high temperature is greater than and 45.0 °F (7.2 °C). About 95% of the time, the high temperature has been between 17.3 °F (-8.2 °C) and 58.5 °F (14.7 °C).

Low Temperatures

On December 9 in Chicago, IL (Illinois), USA the average low temperature is 25.0 °F (-3.9 °C). The lowest recored low temperature was -14.1 °F (-25.6 °C) in 1958 and the lowest recored low temperature was 55.4 °F (13.0 °C) in 1946. The low temperature is usually* between 17.6 °F (-8.0 °C) and 32.3 °F (0.2 °C). About a quarter of the time, the low temperature is less than 17.6 °F (-8.0 °C), and another quarter of the time, the low temperature is greater than and 32.3 °F (0.2 °C). About 95% of the time, the low temperature has been between 3.6 °F (-15.8 °C) and 46.3 °F (7.9 °C).

Frost

On December 9 in Chicago, IL (Illinois), USA expect the temperatures to drop below freezing for a risk of frost about 74.1% 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: