Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The onset of December coincides with a reduction in the average high-temperature, falling from a frosty 45.1°F (7.3°C) in November to an icy 32.5°F (0.3°C). In the month of December, Sunnyside witnesses a consistent average low-temperature of 17.2°F (-8.2°C).Humidity
The average relative humidity in December is 72%.Rainfall
In Sunnyside, during December, the rain falls for 3.6 days and regularly aggregates up to 0.63" (16mm) of precipitation. In Sunnyside, during the entire year, the rain falls for 79.6 days and collects up to 8.7" (221mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Sunnyside, in December, snow falls for 8.3 days, with typically accumulated 5.08" (129mm) of snow. Throughout the year, there are 41 snowfall days, and 25.87" (657mm) of snow is accumulated.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 7:23 am and sunset at 4:58 pm. On the last day of December, sunrise is at 7:41 am and sunset at 5:07 pm MST.
Sunshine
The average sunshine in December in Sunnyside is 6.5h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the average person.Note: A maximum UV index of 2 in December translates into the following recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How many days does it rain in December in Sunnyside?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Sunnyside have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Sunnyside have in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Sunnyside, UT
- Average high temperature in December: 32.5°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (32°F).
- Average low temperature in December: 17.2°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).
Average pressure in December
Sunnyside, UT
- Average pressure in December: 30.19"Hg
The month with the highest atmospheric pressure is January (30.26"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Sunnyside, UT
- Average wind speed in December: 4.9mph
The windiest month (with the highest average wind speed) is April (7.9mph).
The calmest month (with the lowest average wind speed) is January (4.5mph).
Average humidity in December
Sunnyside, UT
- Average humidity in December: 72%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is June (29%).
Average rainfall in December
Sunnyside, UT
- Average rainfall in December: 0.63"
The wettest month (with the highest rainfall) is July (1.3").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in December
Sunnyside, UT
- Average rainfall days in December: 3.6 days
The month with the highest number of rainy days is July (12.8 days).
The month with the least rainy days is January (2.4 days).
Average snowfall in December
Sunnyside, UT
- Average snowfall in December: 5.08"
The month with the highest snowfall is March (5.35").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Sunnyside, UT
- Average snowfall days in December: 8.3 days
The months with the highest number of snowfall days are February and December (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Sunnyside, UT
- Average daylight in December: 9h and 2min
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 3min
The months with the most sunshine are June and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 6h and 6min).
Average sunshine days in December
Sunnyside, UT
- Average sunshine days in December: 22.5 days
The month with the most sunshine days is January (24.4 days).
The month with the least sunshine days is July (11.1 days).
Average UV index in December
Sunnyside, 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
Sunnyside, UT
- Average cloud cover in December: 29
The month with the most cloud cover is January (Cloud cover 32).
The month with the least cloud cover is September (Cloud cover 11).
Average visibility in December
Sunnyside, 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).
Sunnyside, Utah, USA
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