December 21 - GROSSE ILE NAS - Weather History and Averages

Station: GROSSE ILE NAS (1945 to 1969)
Country: US
State: MI
Latitude: 42.1
Longitude: -83.167

High Temperatures

On December 21 in GROSSE ILE NAS the average high temperature is 33.3 °F (0.7 °C). The lowest recored high temperature was 18.0 °F (-7.8 °C) in 1945 and the highest recored high temperature was 57.9 °F (14.4 °C) in 1967. The high temperature is usually^* between 26.5 °F (-3.0 °C) and 40.0 °F (4.4 °C). About a quarter of the time, the high temperature is less than 26.5 °F (-3.0 °C), and another quarter of the time, the high temperature is greater than and 40.0 °F (4.4 °C). About 95% of the time, the high temperature has been between 13.7 °F (-10.2 °C) and 52.8 °F (11.5 °C).

Low Temperatures

On December 21 in GROSSE ILE NAS the average low temperature is 23.3 °F (-4.8 °C). The lowest recored low temperature was 3.9 °F (-15.6 °C) in 1945 and the lowest recored low temperature was 42.1 °F (5.6 °C) in 1949. The low temperature is usually^* between 16.2 °F (-8.8 °C) and 30.5 °F (-0.8 °C). About a quarter of the time, the low temperature is less than 16.2 °F (-8.8 °C), and another quarter of the time, the low temperature is greater than and 30.5 °F (-0.8 °C). About 95% of the time, the low temperature has been between 2.5 °F (-16.4 °C) and 44.2 °F (6.8 °C).

Frost

On December 21 in GROSSE ILE NAS expect the temperatures to drop below freezing for a risk of frost about 79.2% 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:

GROSSE ILE NAS — Weather Bureau Army Navy (WBAN): 14856 — from year 1945 to 1968

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