Salt Lake City Weather in December

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Salt Lake City, Utah usually has more snowfall and cloud cover during December than any other month. Still some December days do warm up to over 50 °F (over 10 °C).

This page gives detailed information on the typical December weather for Salt Lake City. You can jump directly to data and descriptions for:

The numbers here are historical averages based on climate data gathered at the Salt Lake City International Airport, located a few miles northwest of the city's center.

temperature iconTemperature

38 °F December average high 3 °C
23 °F December average low -5 °C

In most years, Salt Lake City averages a daily maximum temperature for December that's between 34 and 42 degrees Fahrenheit (1 to 5 degrees Celsius). The minimum temperature usually falls between 19 and 26 °F (-7 to -3 °C).

The days at Salt Lake City continue to cool down during December. By the end of the month, the city has arrived at its chilliest days of the year. The 27th to 31st have daily highs averaging 36.6 °F (2.6 °C) and lows of 21.6 °F (-5.8 °C).

12 days 40 °F maximum or above (4 °C)
11 days 20 °F minimum or below (-8 °C)

Salt Lake City averages 3 days in December when the thermometer reaches into the 50s °F (over 10 °C). Only in rare years does the temperature get above 60 °F (16 °C) during December. Typically on 8 days the mercury remains below freezing for the entire day.

Most December nights are below freezing. The thermometer dips to 10 °F (-12 °C) or lower on an average of 2 nights. Some years can see the temperature during December plummet briefly to 0 °F (-18 °C) or colder.

precipitation iconPrecipitation

1.4 inches total December precipitation 36 millimetres
10 days of rain or snowfall

Half the time, Salt Lake City receives 0.6 to 1.7 inches (16 to 44 mm) of precipitation in December. One in four years has drier weather, while another one in four is wetter.

snowfall iconSnow

13.2 inches total December snowfall 33.5 centimetres
8 days with new snow

December's snowfall varies a lot from year to year in Salt Lake City. Between 7 and 17 inches (18 to 43 cm) of fresh snow arrives in half the years. Less new snow lands in one out of four Decembers, while another twenty-five percent are snowier.

Salt Lake City typically has at least an inch (2.5 cm) of snow on the ground for 14 days this month. The snow normally accumulates to 5 inches (13 cm) or deeper on 3 days.

sunshine iconSun

42 % sunshine in December
6 days with clear skies

The sun's rays reach the ground in Salt Lake City during 42 percent of daylight hours on average in December, for a total of 121 hours in the month. Typically on 6 days this month the sky is mainly clear, with at most 30 percent cloud cover. December is the cloudiest month for Salt Lake City.

Sunlight in December at Salt Lake City averages 9 hours and 18 minutes a day. The shortest days of the year, from around December 17th to 24th, last 9 hours and 15 minutes from sunrise to sunset.

humidity iconHumidity

74 % December average humidity

The relative humidity in Salt Lake City during December usually peaks at 79 percent in the morning then drops to 63 percent in the afternoon.

Local Time2 am5 am8 am11 am2 pm5 pm8 pm11 pm
Humidity % 78 79 79 70 63 71 77 78

wind iconWind

7.6 mph December wind speed average 12.2 kph

December is less windy than most other months in Salt Lake City.

lightning cloud iconStorms

4 days snowfall of 1 inch (2.5 cm) or more
0 days with thunderstorms in December

Snowstorms occur most often during December at Salt Lake City.

Although thunderstorms are less common in December than other months, every few years, Salt Lake City does have thunder and lightning this month.

Reference

These weather data are long-term historical averages provided by the National Climatic Data Center of the United States. The temperature and precipitation numbers are 1981-2010 normals while the humidity and thunderstorm statistics are 1961-1990 normals.

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