December weather forecastMountain View, WY
December
Weather in December
December in Mountain View embodies the core of winter with temperatures reaching a low of 12.6°F (-10.8°C). The dramatic increase in snowfall to 5.79" (147mm) completes the transformation into winter weather, typical of Wyoming. Shorter daylight hours and reduced sunshine hours contribute to the overall colder climate. The increased humidity aids in maintaining the cold weather, supporting snow preservation and a genuine winter ambiance. Despite lower visibility due to cloud cover and snowfall, December portrays the scenic beauty of a winter wonderland in Mountain View.Temperature
December is the coldest month, exhibiting average temperatures of 26.6°F (-3°C) at the peak and 12.6°F (-10.8°C) at the base.Humidity
The average relative humidity in December is 80%.Rainfall
In Mountain View, in December, during 8.3 rainfall days, 0.79" (20mm) of precipitation is typically accumulated. Throughout the year, there are 112.2 rainfall days, and 11.57" (294mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. In Mountain View, in December, snow falls for 13.3 days, with typically accumulated 5.79" (147mm) of snow. In Mountain View, during the entire year, snow falls for 85.7 days and aggregates up to 41.18" (1046mm) 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 the month, sunrise is at 7:28 am and sunset at 4:52 pm. On the last day of December, in Mountain View, sunrise is at 7:46 am and sunset at 5:02 pm MST.
Sunshine
With an average of 6.4h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.Note: A daily maximum UV index of 2 in December translates into the following instructions:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Mountain View, WY
- Average high temperature in December: 26.6°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is December (26.6°F).
- Average low temperature in December: 12.6°F
The month with the highest average low temperature is July (55.6°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).
Average pressure in December
Mountain View, WY
- Average pressure in December: 30.24"Hg
The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Mountain View, WY
- Average wind speed in December: 8.9mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity in December
Mountain View, WY
- Average humidity in December: 80%
The months with the highest relative humidity are January and February (82%).
The months with the lowest relative humidity are July and August (36%).
Average rainfall in December
Mountain View, WY
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is May (2.01").
The driest months (with the least rainfall) are January and July (0.63").
Average rainfall days in December
Mountain View, WY
- Average rainfall days in December: 8.3 days
The month with the highest number of rainy days is May (16.1 days).
The month with the least rainy days is November (6 days).
Average snowfall in December
Mountain View, WY
- Average snowfall in December: 5.79"
The month with the highest snowfall is March (8.78").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Mountain View, WY
- Average snowfall days in December: 13.3 days
The month with the highest number of snowfall days is March (15.1 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Mountain View, WY
- 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 24min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in December
Mountain View, WY
- Average sunshine days in December: 15.7 days
The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is April (9.4 days).
Average UV index in December
Mountain View, WY
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in December
Mountain View, WY
- Average cloud cover in December: 33
The month with the most cloud cover is February (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 12).
Average visibility in December
Mountain View, WY
- 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).
