December weather forecastBluff, UT
December
Weather in December
December often marks the onset of winter in Bluff, Utah, with average high temperatures dropping to a chilly 38.3°F (3.5°C). This month records a significant increase in snowfall tallies, with an impressive 5.2" (132mm) accumulated over 6.5 days, denoting the coldest part of the year. While the shorter daylight hours of winter are pronounced, December daylights are slightly longer compared to the first month of the year. Interestingly, despite the cold temperatures, December witnesses a decrease in rainfall days compared to November. As the year ends, the winter weather fully takes hold, setting the stage for a new year of varying climatic patterns.Temperature
Stepping into December, Bluff observes a temperature decline, with the average high falling from November's cool 50.7°F (10.4°C) to a cold 38.3°F (3.5°C). Bluff, during the month of December, experiences an average low-temperature of 23.7°F (-4.6°C).Humidity
In December, the average relative humidity is 65%.Rainfall
In Bluff, during December, the rain falls for 3.7 days and regularly aggregates up to 0.71" (18mm) of precipitation. Throughout the year, there are 73.8 rainfall days, and 7.72" (196mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. December is the month with the most snowfall. Snow falls for 6.5 days and accumulates 5.2" (132mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 7:14 am and sunset at 5:00 pm. On the last day of December, sunrise is at 7:32 am and sunset at 5:11 pm MST.
Sunshine
In December, the average sunshine is 6.7h.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 estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: An average maximum UV index of 2 in December leads to these recommendations:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Bluff, UT
- Average high temperature in December: 38.3°F
The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (36.5°F).
- Average low temperature in December: 23.7°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in December
Bluff, UT
- Average pressure in December: 30.16"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Bluff, UT
- Average wind speed in December: 5.3mph
The windiest month (with the highest average wind speed) is April (9.2mph).
The calmest month (with the lowest average wind speed) is January (5.1mph).
Average humidity in December
Bluff, UT
- Average humidity in December: 65%
The month with the highest relative humidity is January (71%).
The month with the lowest relative humidity is June (22%).
Average rainfall in December
Bluff, UT
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is August (1.1").
The driest month (with the least rainfall) is June (0.31").
Average rainfall days in December
Bluff, UT
- Average rainfall days in December: 3.7 days
The month with the highest number of rainy days is July (12.7 days).
The month with the least rainy days is February (2.9 days).
Average snowfall in December
Bluff, UT
- Average snowfall in December: 5.2"
The month with the highest snowfall is December (5.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Bluff, UT
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is December (6.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Bluff, UT
- Average daylight in December: 9h and 36min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 6h and 42min
The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 6h and 36min).
Average sunshine days in December
Bluff, UT
- Average sunshine days in December: 22.6 days
The month with the most sunshine days is November (25.5 days).
The month with the least sunshine days is July (11.9 days).
Average UV index in December
Bluff, 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
Bluff, UT
- Average cloud cover in December: 26
The months with the most cloud cover are January and December (Cloud cover 26).
The month with the least cloud cover is June (Cloud cover 10).
Average visibility in December
Bluff, UT
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
