December 21 - CHICAGO / CALUMET COAST GUARD - Weather History and Averages

Station: CHICAGO / CALUMET COAST GUARD (1994 to 1996)
Country: US
Latitude: 41.72
Longitude: -87.53

High Temperatures

On December 21 in CHICAGO / CALUMET COAST GUARD the average high temperature is 33.2 °F (0.6 °C). The lowest recored high temperature was 28.9 °F (-1.7 °C) in 1995 and the highest recored high temperature was 43.0 °F (6.1 °C) in 1994. The high temperature is usually^* between 28.7 °F (-1.8 °C) and 37.6 °F (3.1 °C). About a quarter of the time, the high temperature is less than 28.7 °F (-1.8 °C), and another quarter of the time, the high temperature is greater than and 37.6 °F (3.1 °C). About 95% of the time, the high temperature has been between 20.2 °F (-6.6 °C) and 46.1 °F (7.8 °C).

Low Temperatures

On December 21 in CHICAGO / CALUMET COAST GUARD the average low temperature is 24.2 °F (-4.3 °C). The lowest recored low temperature was 19.9 °F (-6.7 °C) in 1995 and the lowest recored low temperature was 34.0 °F (1.1 °C) in 1994. The low temperature is usually^* between 19.5 °F (-6.9 °C) and 28.8 °F (-1.8 °C). About a quarter of the time, the low temperature is less than 19.5 °F (-6.9 °C), and another quarter of the time, the low temperature is greater than and 28.8 °F (-1.8 °C). About 95% of the time, the low temperature has been between 10.7 °F (-11.9 °C) and 37.7 °F (3.2 °C).

Frost

On December 21 in CHICAGO / CALUMET COAST GUARD expect the temperatures to drop below freezing for a risk of frost about 87.2% 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:

CHICAGO / CALUMET COAST GUARD — Integrated Surface Dataset (ISD) station ID: 725344 — from year 1994 to 1995

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