December weather forecast
Bluff, UT

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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

During the transition into December, Bluff observes a decrease in the average high-temperature, falling from a fresh 50.7°F (10.4°C) in November to a cold 38.3°F (3.5°C). In December, Bluff encounters an average low-temperature of 23.7°F (-4.6°C) during the night.

Humidity

In December, the average relative humidity is 65%.

Rainfall

In December, the rain falls for 3.7 days. Throughout December, 0.71" (18mm) of precipitation is accumulated. In Bluff, during the entire year, the rain falls for 73.8 days and collects up to 7.72" (196mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall. December is the month with the most snowfall. Snow falls for 6.5 days and accumulates 5.2" (132mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 36min of daylight.
On the first day of December in Bluff, Utah, sunrise is at 7:14 am and sunset at 5:00 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 5:11 pm MST.

Sunshine

In December, the average sunshine is 6.7h.

UV index

The months with the lowest UV index in Bluff are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, the maximum UV index of 2 transforms into these recommendations:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
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Frequently asked questions

How cold is it in Bluff in December?

In December, in Bluff, the average high-temperature is 38.3°F (3.5°C), and the average low-temperature is 23.7°F (-4.6°C).

What is the average humidity in December in Bluff?

In Bluff, the average relative humidity in December is 65%.

How many days does it rain in December in Bluff?

In Bluff, in December, during 3.7 rainfall days, 0.71" (18mm) of precipitation is typically accumulated.

What is the snowiest month in Bluff?

The month with the most snowfall in Bluff, Utah, is December, when snow falls for 6.5 days and typically aggregates up to 5.2" (132mm) of snow.

How many days does it snow in December in Bluff?

In Bluff, during December, snow falls for 6.5 days and regularly aggregates up to 5.2" (132mm) of snow.

What is the month with the shortest days in Bluff?

With an average of 9h and 36min of daylight, December has the shortest days of the year in Bluff, Utah.

How many hours of daylight does Bluff have in December?

In December, the average day length in Bluff is 9h and 39min.

When is the sunrise / sunset in December in Bluff?

In December, on the first day of the month, sunrise is at 7:14 am and sunset at 5:00 pm. On the last day of the month, in Bluff, sunrise is at 7:32 am and sunset at 5:11 pm MST.

How many hours of sunshine does Bluff have in December?

In Bluff, Utah, the average sunshine duration in December is 6.7h.

What is the month with the lowest UV index in Bluff?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

How high is the UV index in December in Bluff?

In Bluff, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
Nov
December
Jan
Average high temperature
50.7°F 10.4°C
38.3°F 3.5°C
36.5°F 2.5°C
Average low temperature
33.1°F 0.6°C
23.7°F -4.6°C
22.5°F -5.3°C
Average pressure
30.09" 764mmHg
30.16" 766mmHg
30.23" 768mmHg
Average wind speed
6.2mph 10km/h
5.3mph 8.5km/h
5.1mph 8.2km/h
Average max. wind speed
6.9mph 11.1km/h
6mph 9.7km/h
5.6mph 9km/h
Average wind speed gusts
10.5mph 16.9km/h
9.4mph 15.1km/h
9.3mph 15km/h
Average humidity
48%
65%
71%
Average rainfall
0.43" 11mm
0.71" 18mm
0.55" 14mm
Average rainfall days
3.1
3.7
3.3
Average snowfall
0.39" 10mm
5.2" 132mm
4.06" 103mm
Average snowfall days
2.1
6.5
6
Average daylight
10h 1min
9h 4min
9h 5min
Average sunshine
7h 3min
6h 4min
6h 4min
Average sunshine days
25.5
22.6
24.2
Average UV index
2
2
2
Average cloud cover
14%
26%
26%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in December
Bluff, UT

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).

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Average pressure in December
Bluff, UT

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).

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Average wind speed in December
Bluff, UT

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).

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Average humidity in December
Bluff, UT

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%).

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Average rainfall in December
Bluff, UT

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").

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Average rainfall days in December
Bluff, UT

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).

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Average snowfall in December
Bluff, UT

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").

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Average snowfall days in December
Bluff, UT

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).

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Average daylight in December /
Average sunshine in December
Bluff, UT

Average daylight in December / Average sunshine in December - Bluff, UT
  • Average daylight in December: 9h and 4min

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 4min

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).

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Average sunshine days in December
Bluff, UT

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).

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Average UV index in December
Bluff, UT

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).

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Average cloud cover in December
Bluff, UT

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).

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Average visibility in December
Bluff, UT

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).

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Bluff, Utah, USA

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