December weather forecastVernal, UT
December
Weather in December
December in Vernal embraces the winter season fully, characterized by the coldest temperatures. With highs averaging at a chilling 31.1°F (-0.5°C) and lows dropping to 16.2°F (-8.8°C), the climate mimics that of January. The wintry beauty of Vernal prevails once again, adding a festive charm to the holiday season. Despite the chilly weather, December's enchanting allure makes it a delightful month to commemorate year-end festivities.Temperature
In Vernal, the average high-temperature in December drops from a frosty 44.2°F (6.8°C) in November to a subzero cold 31.1°F (-0.5°C). The nighttime temperature dips to a still freezing cold 16.2°F (-8.8°C) on average during December.Humidity
In December, the average relative humidity is 74%.Rainfall
In Vernal, in December, during 6.1 rainfall days, 0.59" (15mm) of precipitation is typically accumulated. In Vernal, Utah, during the entire year, the rain falls for 83.2 days and collects up to 5.75" (146mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. December is the month with the most snowfall. Snow falls for 8.5 days and accumulates 4.29" (109mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:22 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 5:01 pm MST.
Sunshine
In Vernal, the average sunshine in December is 6.8h.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 value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 2 during December translates into the following directions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Vernal, UT
- Average high temperature in December: 31.1°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (30°F).
- Average low temperature in December: 16.2°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (12.7°F).
Average pressure in December
Vernal, 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 (29.87"Hg).
Average wind speed in December
Vernal, UT
- Average wind speed in December: 3.9mph
The windiest month (with the highest average wind speed) is June (7.5mph).
The calmest month (with the lowest average wind speed) is January (3.4mph).
Average humidity in December
Vernal, UT
- Average humidity in December: 74%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is June (30%).
Average rainfall in December
Vernal, UT
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is April (0.71").
The driest month (with the least rainfall) is November (0.31").
Average rainfall days in December
Vernal, UT
- Average rainfall days in December: 6.1 days
The month with the highest number of rainy days is April (10.8 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in December
Vernal, UT
- Average snowfall in December: 4.29"
The month with the highest snowfall is December (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Vernal, UT
- Average snowfall days in December: 8.5 days
The month with the highest number of snowfall days is January (10.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Vernal, UT
- Average daylight in December: 9h and 18min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 6h and 48min
The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 30min).
Average sunshine days in December
Vernal, UT
- Average sunshine days in December: 20.6 days
The month with the most sunshine days is October (22.4 days).
The month with the least sunshine days is April (15.3 days).
Average UV index in December
Vernal, 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
Vernal, UT
- Average cloud cover in December: 27
The month with the most cloud cover is February (Cloud cover 30).
The months with the least cloud cover are August and September (Cloud cover 11).
Average visibility in December
Vernal, UT
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
