December weather forecast
Moose, WY

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Weather in December

December marks the advent of the coldest period in Moose, Wyoming, characterized by temperatures that can reach a low of 4.1°F (-15.5°C). The intense snowfall of 22.44" (570mm) transforms the city into a white canvas. Daylight becomes scarce, often leaving Moose under a serene twilight. Amidst the cold weather, the holiday spirits are high with festive decorations and celebrations. As the year winds down, the city is enveloped by a chilled yet festive mood.

Temperature

The month of December sees the lowest average temperatures in Moose, reaching 21°F (-6.1°C) at the peak and 4.1°F (-15.5°C) at the low.

Humidity

In Moose, the average relative humidity in December is 92%.

Rainfall

In Moose, Wyoming, in December, it is raining for 5.5 days, with typically 2.68" (68mm) of accumulated precipitation. Throughout the year, there are 116.8 rainfall days, and 27.95" (710mm) of precipitation is accumulated.

Snowfall

January through June, September through December are months with snowfall. In Moose, in December, during 21.7 snowfall days, 22.44" (570mm) of snow is typically accumulated. Throughout the year, there are 130.7 snowfall days, and 137.48" (3492mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Moose, with an average of 9h and 0min of daylight.
On the first day of the month, sunrise is at 7:37 am and sunset at 4:47 pm. On the last day of December, in Moose, sunrise is at 7:56 am and sunset at 4:56 pm MST.

Sunshine

In December, the average sunshine is 3.8h.

UV index

The months with the lowest UV index in Moose are January through March, October through 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 ordinary individuals.
Note: In December, the average maximum UV index of 1 translates into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
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Frequently asked questions

What is the coldest time of year in Moose?

With its average high temperature of 21°F (-6.1°C) and a low of 4.1°F (-15.5°C), December is regarded as the coldest month.

How cold is it in Moose in December?

Moose in December has an average high-temperature of 21°F (-6.1°C) and an average low-temperature of 4.1°F (-15.5°C).

What is the average humidity in December in Moose?

The average relative humidity in December in Moose is 92%.

How much does it rain in Moose in December?

In Moose, Wyoming, during December, the rain falls for 5.5 days and regularly aggregates up to 2.68" (68mm) of precipitation.

How many days does it snow in December in Moose?

In December, in Moose, Wyoming, it is snowing for 21.7 days. Throughout December, 22.44" (570mm) of snow is accumulated.

What is the month with the shortest days in Moose?

December has the shortest days of the year in Moose, with an average of 9h and 0min of daylight.

How many hours of daylight does Moose have in December?

The average day length in December is 9h and 0min.

When is the sunrise / sunset in December in Moose?

On the first day of December in Moose, Wyoming, sunrise is at 7:37 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:56 am and sunset at 4:56 pm MST.

How many hours of sunshine does Moose have in December?

The average sunshine duration in December is 3.8h.

When is the lowest UV index in Moose?

The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 1.

What is the UV index reading in December in Moose?

The average daily maximum UV index in December in Moose, Wyoming, is 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to UV radiation.
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
Moose, WY

Average temperature in December - Moose, WY
  • Average high temperature in December: 21°F

The warmest month (with the highest average high temperature) is July (72°F).
The month with the lowest average high temperature is December (21°F).

  • Average low temperature in December: 4.1°F

The month with the highest average low temperature is July (43.9°F).
The coldest month (with the lowest average low temperature) is December (4.1°F).

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Average pressure in December
Moose, WY

Average pressure in December - Moose, WY
  • Average pressure in December: 30.24"Hg

The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in December
Moose, WY

Average wind speed in December - Moose, WY
  • Average wind speed in December: 4.5mph

The windiest month (with the highest average wind speed) is June (5.8mph).
The calmest months (with the lowest average wind speed) are January and December (4.5mph).

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Average humidity in December
Moose, WY

Average humidity in December - Moose, WY
  • Average humidity in December: 92%

The month with the highest relative humidity is February (94%).
The month with the lowest relative humidity is August (50%).

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Average rainfall in December
Moose, WY

Average rainfall in December - Moose, WY
  • Average rainfall in December: 2.68"

The wettest month (with the highest rainfall) is February (3.23").
The driest month (with the least rainfall) is August (1.42").

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Average rainfall days in December
Moose, WY

Average rainfall days in December - Moose, WY
  • Average rainfall days in December: 5.5 days

The month with the highest number of rainy days is May (16.2 days).
The months with the least rainy days are January and February (3.9 days).

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Average snowfall in December
Moose, WY

Average snowfall in December - Moose, WY
  • Average snowfall in December: 22.44"

The month with the highest snowfall is February (25.94").
The months with the least snowfall are July and August (0").

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Average snowfall days in December
Moose, WY

Average snowfall days in December - Moose, WY
  • Average snowfall days in December: 21.7 days

The month with the highest number of snowfall days is December (21.7 days).
The month with the least snowfall days is July (0 days).

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Average daylight in December /
Average sunshine in December
Moose, WY

Average daylight in December / Average sunshine in December - Moose, WY
  • Average daylight in December: 9h and 0min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in December: 3h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).

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Average sunshine days in December
Moose, WY

Average sunshine days in December - Moose, WY
  • Average sunshine days in December: 9.5 days

The month with the most sunshine days is July (15.6 days).
The month with the least sunshine days is April (7 days).

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Average UV index in December
Moose, WY

Average UV index in December - Moose, WY
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 1).

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Average cloud cover in December
Moose, WY

Average cloud cover in December - Moose, WY
  • Average cloud cover in December: 65

The month with the most cloud cover is February (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 15).

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Average visibility in December
Moose, WY

Average visibility in December - Moose, WY
  • Average visibility in December: 3mi

The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January and February (2mi).

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Moose, Wyoming, USA

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