December weather forecast
Hyrum, UT

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Weather in December

The first month of the winter, December, is still a freezing cold month in Hyrum, Utah, with an average temperature varying between 28.8°F (-1.8°C) and 15.3°F (-9.3°C).

Temperature

The coldest period, with an average high-temperature of 28.8°F (-1.8°C), falls in January and December.

Humidity

In Hyrum, Utah, the average relative humidity in December is 85%.

Rainfall

In Hyrum, in December, during 11 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. In Hyrum, Utah, during the entire year, the rain falls for 122.8 days and collects up to 16.89" (429mm) of precipitation.

Snowfall

Months with snowfall are January through May, September through December. In Hyrum, in December, during 16.3 snowfall days, 12.91" (328mm) of snow is typically accumulated. Throughout the year, there are 77.8 snowfall days, and 58.86" (1495mm) of snow is accumulated.

Daylight

The month with the shortest days in Hyrum is December, with an average of 9h and 12min of daylight.
On the first day of December in Hyrum, Utah, sunrise is at 7:35 am and sunset at 4:57 pm. On the last day of the month, sunrise is at 7:54 am and sunset at 5:07 pm MST.

Sunshine

In December, the average sunshine in Hyrum is 5.4h.

UV index

The months with the lowest UV index in Hyrum are January, November and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: A daily maximum UV index of 1 in December translates into the following instructions:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
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Frequently asked questions

What is the coldest time of year in Hyrum?

During January and December, Hyrum registers its lowest temperatures, averaging a high of 28.8°F (-1.8°C).

How cold is December in Hyrum?

In Hyrum, 28.8°F (-1.8°C) is the average high-temperature and 15.3°F (-9.3°C) is the average low-temperature during December.

What is the average humidity in December in Hyrum?

In December, the average relative humidity in Hyrum is 85%.

How much does it rain in Hyrum in December?

In Hyrum, Utah, during December, the rain falls for 11 days and regularly aggregates up to 2.05" (52mm) of precipitation.

How many days does it snow in December in Hyrum?

In Hyrum, in December, during 16.3 snowfall days, 12.91" (328mm) of snow is typically accumulated.

What is the month with the shortest days in Hyrum?

December has the shortest days of the year in Hyrum, with an average of 9h and 12min of daylight.

What is the average length of the day in December in Hyrum?

In Hyrum, Utah, the average day length in December is 9h and 13min.

When are sunrise and sunset in December in Hyrum?

In December, on the first day of the month, sunrise is at 7:35 am and sunset at 4:57 pm. On the last day of the month, in Hyrum, sunrise is at 7:54 am and sunset at 5:07 pm MST.

How long on average sun shines in December in Hyrum?

In Hyrum, Utah, the average sunshine duration in December is 5.4h.

What are the months with the lowest UV index in Hyrum?

The months with the lowest UV index are January, November and December, with an average maximum UV index of 1.

What is the UV index reading in December in Hyrum?

In December, the average daily maximum UV index in Hyrum, Utah, is 1. A UV Index reading of 2, and below, represents a minimal hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Hyrum, UT

Average temperature in December - Hyrum, UT
  • Average high temperature in December: 28.8°F

The warmest month (with the highest average high temperature) is July (83.3°F).
The months with the lowest average high temperature are January and December (28.8°F).

  • Average low temperature in December: 15.3°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 (14°F).

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Average pressure in December
Hyrum, UT

Average pressure in December - Hyrum, UT
  • Average pressure in December: 30.24"Hg

The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in December
Hyrum, UT

Average wind speed in December - Hyrum, UT
  • Average wind speed in December: 4.4mph

The windiest months (with the highest average wind speed) are April and June (5.8mph).
The calmest month (with the lowest average wind speed) is January (4mph).

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Average humidity in December
Hyrum, UT

Average humidity in December - Hyrum, UT
  • Average humidity in December: 85%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (38%).

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Average rainfall in December
Hyrum, UT

Average rainfall in December - Hyrum, UT
  • Average rainfall in December: 2.05"

The wettest month (with the highest rainfall) is January (2.36").
The driest month (with the least rainfall) is July (0.43").

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Average rainfall days in December
Hyrum, UT

Average rainfall days in December - Hyrum, UT
  • Average rainfall days in December: 11 days

The month with the highest number of rainy days is April (16.1 days).
The month with the least rainy days is August (6 days).

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Average snowfall in December
Hyrum, UT

Average snowfall in December - Hyrum, UT
  • Average snowfall in December: 12.91"

The month with the highest snowfall is January (16.18").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in December
Hyrum, UT

Average snowfall days in December - Hyrum, UT
  • Average snowfall days in December: 16.3 days

The month with the highest number of snowfall days is January (17.2 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in December / Average sunshine in December - Hyrum, UT
  • Average daylight in December: 9h and 1min

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 12min).

  • Average sunshine in December: 5h and 2min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).

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Average sunshine days in December
Hyrum, UT

Average sunshine days in December - Hyrum, UT
  • Average sunshine days in December: 11.6 days

The month with the most sunshine days is June (21.6 days).
The month with the least sunshine days is February (7.8 days).

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Average UV index in December
Hyrum, UT

Average UV index in December - Hyrum, UT
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).

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Average cloud cover in December
Hyrum, UT

Average cloud cover in December - Hyrum, UT
  • Average cloud cover in December: 45

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 10).

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Average visibility in December
Hyrum, UT

Average visibility in December - Hyrum, UT
  • Average visibility in December: 5mi

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).

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Hyrum, Utah, USA

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