December weather forecastAltamont, UT
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Altamont, Utah, with temperature in the range of an average low of 12.9°F (-10.6°C) and an average high of 28.9°F (-1.7°C).Temperature
The coldest period falls in January and December, when the average high-temperature reaches 28.9°F (-1.7°C).Humidity
The average relative humidity in December is 78%.Rainfall
In Altamont, in December, during 9.1 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. Throughout the year, there are 124.1 rainfall days, and 12.87" (327mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Altamont, in December, during 11.3 snowfall days, 6.97" (177mm) of snow is typically accumulated. In Altamont, during the entire year, snow falls for 55.2 days and aggregates up to 33.5" (851mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:25 am and sunset at 4:55 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 5:05 pm MST.
Sunshine
In December, the average sunshine in Altamont is 6.6h.UV index
The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the average person.Note: The average daily UV index of 2 in December transforms into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Altamont, UT
- Average high temperature in December: 28.9°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The months with the lowest average high temperature are January and December (28.9°F).
- Average low temperature in December: 12.9°F
The month with the highest average low temperature is July (55.4°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in December
Altamont, UT
- Average pressure in December: 30.21"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in December
Altamont, UT
- Average wind speed in December: 5.7mph
The windiest month (with the highest average wind speed) is April (7.7mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in December
Altamont, UT
- Average humidity in December: 78%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is June (36%).
Average rainfall in December
Altamont, UT
- Average rainfall in December: 0.98"
The wettest month (with the highest rainfall) is May (1.65").
The driest month (with the least rainfall) is November (0.71").
Average rainfall days in December
Altamont, UT
- Average rainfall days in December: 9.1 days
The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is November (6.2 days).
Average snowfall in December
Altamont, UT
- Average snowfall in December: 6.97"
The month with the highest snowfall is February (7.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Altamont, UT
- Average snowfall days in December: 11.3 days
The month with the highest number of snowfall days is February (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Altamont, UT
- Average daylight in December: 9h and 24min
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 24min).
- Average sunshine in December: 6h and 36min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 6h and 24min).
Average sunshine days in December
Altamont, UT
- Average sunshine days in December: 16.9 days
The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is April (12.4 days).
Average UV index in December
Altamont, UT
- 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, October, November and December (UV index 2).
Average cloud cover in December
Altamont, UT
- Average cloud cover in December: 30
The month with the most cloud cover is February (Cloud cover 33).
The months with the least cloud cover are June and September (Cloud cover 13).
Average visibility in December
Altamont, 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).
