December weather forecastAlta, WY
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Alta, Wyoming, with an average temperature fluctuating between 7.7°F (-13.5°C) and 23.2°F (-4.9°C).Temperature
December, recording an average high temperature of 23.2°F (-4.9°C) and a low temperature of 7.7°F (-13.5°C), is Alta's coldest month.Humidity
The average relative humidity in December is 91%.Rainfall
In Alta, in December, during 4.5 rainfall days, 3.15" (80mm) of precipitation is typically accumulated. Throughout the year, in Alta, there are 96.6 rainfall days, and 32.95" (837mm) of precipitation is accumulated.Snowfall
January through June, August through December are months with snowfall. In Alta, in December, snow falls for 22.8 days, with typically accumulated 25.87" (657mm) of snow. In Alta, during the entire year, snow falls for 160.8 days and aggregates up to 200.16" (5084mm) of snow.Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:38 am and sunset at 4:48 pm. On the last day of December, sunrise is at 7:57 am and sunset at 4:57 pm MST.
Sunshine
In Alta, the average sunshine in December is 3.6h.UV index
The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: In December, the maximum UV index of 1 suggests these recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Alta, WY
- Average high temperature in December: 23.2°F
The warmest month (with the highest average high temperature) is July (75.4°F).
The month with the lowest average high temperature is December (23.2°F).
- Average low temperature in December: 7.7°F
The month with the highest average low temperature is July (46.9°F).
The coldest month (with the lowest average low temperature) is December (7.7°F).
Average pressure in December
Alta, WY
- Average pressure in December: 30.24"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Alta, WY
- Average wind speed in December: 4.8mph
The windiest month (with the highest average wind speed) is June (6.2mph).
The calmest months (with the lowest average wind speed) are January and December (4.8mph).
Average humidity in December
Alta, WY
- Average humidity in December: 91%
The month with the highest relative humidity is February (94%).
The month with the lowest relative humidity is August (47%).
Average rainfall in December
Alta, WY
- Average rainfall in December: 3.15"
The wettest month (with the highest rainfall) is February (4.13").
The driest month (with the least rainfall) is July (0.91").
Average rainfall days in December
Alta, WY
- Average rainfall days in December: 4.5 days
The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is January (3 days).
Average snowfall in December
Alta, WY
- Average snowfall in December: 25.87"
The month with the highest snowfall is February (34.33").
The month with the least snowfall is July (0").
Average snowfall days in December
Alta, WY
- Average snowfall days in December: 22.8 days
The month with the highest number of snowfall days is March (23.6 days).
The month with the least snowfall days is July (0.1 days).
Average daylight in December /
Average sunshine in December
Alta, WY
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 3h and 36min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 3h and 18min).
Average sunshine days in December
Alta, WY
- Average sunshine days in December: 8.4 days
The month with the most sunshine days is July (20.3 days).
The month with the least sunshine days is April (6.2 days).
Average UV index in December
Alta, WY
- Average UV index in December: 1
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 1).
Average cloud cover in December
Alta, WY
- Average cloud cover in December: 67
The month with the most cloud cover is February (Cloud cover 73).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in December
Alta, WY
- Average visibility in December: 3mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (3mi).
