December weather forecastWashington Terrace, UT
December
Weather in December
December, the first month of the winter in Washington Terrace, is also an icy month, with an average temperature fluctuating between 34°F (1.1°C) and 23.4°F (-4.8°C).Temperature
December's onset brings a slight change in high-temperatures, falling from a frosty 45.5°F (7.5°C) in November to a cold 34°F (1.1°C). During December, Washington Terrace observes a consistent average nighttime temperature of 23.4°F (-4.8°C).Humidity
In Washington Terrace, the average relative humidity in December is 77%.Rainfall
In Washington Terrace, in December, during 5.5 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. Throughout the year, there are 91.6 rainfall days, and 11.06" (281mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. In December, in Washington Terrace, it is snowing for 8.2 days. Throughout December, 4.37" (111mm) of snow is accumulated. Throughout the year, there are 37.8 snowfall days, and 24.76" (629mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:34 am and sunset at 4:59 pm. On the last day of December, sunrise is at 7:53 am and sunset at 5:09 pm MST.
Sunshine
In December, the average sunshine is 6h.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 the ordinary person.Note: The maximum daily UV index of 2 in December converts into the following recommendations:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Washington Terrace, UT
- Average high temperature in December: 34°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in December: 23.4°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in December
Washington Terrace, UT
- Average pressure in December: 30.23"Hg
The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Washington Terrace, UT
- Average wind speed in December: 5.5mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is January (4.8mph).
Average humidity in December
Washington Terrace, UT
- Average humidity in December: 77%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is July (37%).
Average rainfall in December
Washington Terrace, UT
- Average rainfall in December: 1.02"
The wettest month (with the highest rainfall) is April (1.26").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in December
Washington Terrace, UT
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is May (12.5 days).
The month with the least rainy days is January (4.6 days).
Average snowfall in December
Washington Terrace, UT
- Average snowfall in December: 4.37"
The month with the highest snowfall is January (6.89").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Washington Terrace, UT
- Average snowfall days in December: 8.2 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Washington Terrace, UT
- Average daylight in December: 9h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 6h and 0min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in December
Washington Terrace, UT
- Average sunshine days in December: 19.9 days
The months with the most sunshine days are October and November (21.6 days).
The month with the least sunshine days is April (14.7 days).
Average UV index in December
Washington Terrace, 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
Washington Terrace, UT
- Average cloud cover in December: 37
The months with the most cloud cover are January and February (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in December
Washington Terrace, UT
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
