December 31 - Chicago - Weather History and Averages

High Temperatures

On December 31 in Chicago, IL (Illinois), USA the average high temperature is 34.3 °F (1.3 °C). The lowest recored high temperature was 1.9 °F (-16.7 °C) in 2017 and the highest recored high temperature was 60.1 °F (15.6 °C) in 1965. The high temperature is usually* between 27.5 °F (-2.5 °C) and 41.2 °F (5.1 °C). About a quarter of the time, the high temperature is less than 27.5 °F (-2.5 °C), and another quarter of the time, the high temperature is greater than and 41.2 °F (5.1 °C). About 95% of the time, the high temperature has been between 14.4 °F (-9.8 °C) and 54.2 °F (12.3 °C).

Low Temperatures

On December 31 in Chicago, IL (Illinois), USA the average low temperature is 21.2 °F (-6.0 °C). The lowest recored low temperature was -14.8 °F (-26.0 °C) in 1976 and the lowest recored low temperature was 49.6 °F (9.8 °C) in 2004. The low temperature is usually* between 13.3 °F (-10.4 °C) and 29.1 °F (-1.6 °C). About a quarter of the time, the low temperature is less than 13.3 °F (-10.4 °C), and another quarter of the time, the low temperature is greater than and 29.1 °F (-1.6 °C). About 95% of the time, the low temperature has been between -1.7 °F (-18.7 °C) and 44.1 °F (6.7 °C).

Frost

On December 31 in Chicago, IL (Illinois), USA expect the temperatures to drop below freezing for a risk of frost about 82.2% 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: