December weather forecastSoma, UT
December
Weather in December
December, the first month of the winter in Soma, is also a wintry month, with an average temperature ranging between min 17.8°F (-7.9°C) and max 33.8°F (1°C).Temperature
The shift from November to December involves a decrease in the average high-temperature, from a frosty 46.8°F (8.2°C) to a wintry 33.8°F (1°C). During the nights in December, Soma observes an average low-temperature of 17.8°F (-7.9°C).Humidity
The average relative humidity in December is 78%.Rainfall
In December, in Soma, the rain falls for 8.5 days. Throughout December, 1.18" (30mm) of precipitation is accumulated. Throughout the year, in Soma, there are 99.7 rainfall days, and 11.61" (295mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 12.1 days. Throughout December, 7.95" (202mm) of snow is accumulated. In Soma, during the entire year, snow falls for 56.2 days and aggregates up to 40.47" (1028mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:30 am and sunset at 5:05 pm. On the last day of December, in Soma, sunrise is at 7:49 am and sunset at 5:14 pm MST.
Sunshine
The average sunshine in December in Soma, Utah, is 6.1h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 2 during December translates into the following recommendations:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Soma, UT
- Average high temperature in December: 33.8°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in December: 17.8°F
The month with the highest average low temperature is July (58.3°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in December
Soma, UT
- Average pressure in December: 30.2"Hg
The month with the highest atmospheric pressure is January (30.26"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Soma, UT
- Average wind speed in December: 4.8mph
The windiest months (with the highest average wind speed) are April and June (6.5mph).
The calmest month (with the lowest average wind speed) is January (4.3mph).
Average humidity in December
Soma, UT
- Average humidity in December: 78%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is June (34%).
Average rainfall in December
Soma, UT
- Average rainfall in December: 1.18"
The wettest month (with the highest rainfall) is March (1.57").
The driest month (with the least rainfall) is June (0.43").
Average rainfall days in December
Soma, UT
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is April (11.7 days).
The month with the least rainy days is June (5.3 days).
Average snowfall in December
Soma, UT
- Average snowfall in December: 7.95"
The month with the highest snowfall is January (8.9").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Soma, UT
- Average snowfall days in December: 12.1 days
The month with the highest number of snowfall days is December (12.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Soma, UT
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 6h and 6min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 48min).
Average sunshine days in December
Soma, UT
- Average sunshine days in December: 16.3 days
The month with the most sunshine days is June (22 days).
The month with the least sunshine days is February (13.9 days).
Average UV index in December
Soma, UT
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Soma, UT
- Average cloud cover in December: 37
The months with the most cloud cover are January and December (Cloud cover 37).
The month with the least cloud cover is August (Cloud cover 9).
Average visibility in December
Soma, UT
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).





