December 9 - WILMETTE (CGS) - Weather History and Averages

Station: WILMETTE (CGS) (1987 to 1991)
Country: US
State: IL
Latitude: 42.067
Longitude: -87.683

High Temperatures

On December 9 in WILMETTE (CGS) the average high temperature is 40.1 °F (4.5 °C). The lowest recored high temperature was 28.0 °F (-2.2 °C) in 1988 and the highest recored high temperature was 54.9 °F (12.7 °C) in 1990. The high temperature is usually^* between 33.3 °F (0.7 °C) and 46.9 °F (8.3 °C). About a quarter of the time, the high temperature is less than 33.3 °F (0.7 °C), and another quarter of the time, the high temperature is greater than and 46.9 °F (8.3 °C). About 95% of the time, the high temperature has been between 20.3 °F (-6.5 °C) and 59.9 °F (15.5 °C).

Low Temperatures

On December 9 in WILMETTE (CGS) the average low temperature is 27.4 °F (-2.6 °C). The lowest recored low temperature was 20.1 °F (-6.6 °C) in 1988 and the lowest recored low temperature was 40.8 °F (4.9 °C) in 1987. The low temperature is usually^* between 21.1 °F (-6.1 °C) and 33.7 °F (0.9 °C). About a quarter of the time, the low temperature is less than 21.1 °F (-6.1 °C), and another quarter of the time, the low temperature is greater than and 33.7 °F (0.9 °C). About 95% of the time, the low temperature has been between 9.2 °F (-12.7 °C) and 45.6 °F (7.6 °C).

Frost

On December 9 in WILMETTE (CGS) expect the temperatures to drop below freezing for a risk of frost about 69.0% 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:

WILMETTE (CGS) — Integrated Surface Dataset (ISD) station ID: 722417 — from year 1987 to 1990

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