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 average high-temperature in Vernal decreases in December, shifting from a chilly 44.2°F (6.8°C) in November to a subzero cold 31.1°F (-0.5°C). During December, Vernal sees a mean low-temperature of 16.2°F (-8.8°C).Humidity
The average relative humidity in December is 74%.Rainfall
In Vernal, during December, the rain falls for 6.1 days and regularly aggregates up to 0.59" (15mm) of precipitation. In Vernal, during the entire year, the rain falls for 83.2 days and collects up to 5.75" (146mm) of precipitation.Snowfall
Months with snowfall in Vernal are January through May, October through December. The month with the most snowfall is December, when snow falls for 8.5 days and typically aggregates up to 4.29" (109mm) of snow.Daylight
December has the shortest days of the year in Vernal, Utah, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:22 am and sunset at 4:52 pm. On the last day of December, in Vernal, Utah, 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 in Vernal. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Frequently asked questions
How cold is December in Vernal?
What is the average humidity in December in Vernal?
How many days does it rain in December in Vernal?
When does it snow the most in Vernal?
How many days does it snow in December in Vernal?
What is the month with the shortest days in Vernal?
What is the average length of the day in December in Vernal?
What time are sunrise and sunset in December in Vernal?
How many hours of sunshine does Vernal have in December?
What are the months with the lowest UV index in Vernal?
What is the UV index reading in December in Vernal?
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 2min
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 5min
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).
Vernal, Utah, USA
Weather forecast for your location
2. Allow the app to use your location
