December weather forecast
Musselshell, MT

Weather in December

December, the first month of the winter in Musselshell, is also a subzero cold month, with an average temperature fluctuating between 18.5°F (-7.5°C) and 31.1°F (-0.5°C).

Temperature

December is the coldest month, with an average high-temperature of 31.1°F (-0.5°C) and an average low-temperature of 18.5°F (-7.5°C).

Humidity

The average relative humidity in December is 74%.

Rainfall

In December, in Musselshell, Montana, the rain falls for 5.5 days. Throughout December, 0.59" (15mm) of precipitation is accumulated. Throughout the year, in Musselshell, there are 114.3 rainfall days, and 12.13" (308mm) of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall. In Musselshell, during 9.6 snowfall days, 2.72" (69mm) of snow is typically accumulated. Throughout the year, in Musselshell, Montana, there are 53.5 snowfall days, and 18.58" (472mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 8h and 39min of daylight.
On the first day of December, sunrise is at 7:35 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:56 am and sunset at 4:34 pm MST.

Sunshine

February and December, with an average of 5.2h of sunshine, are months with the least sunshine in Musselshell.

UV index

The month with the lowest UV index in Musselshell, Montana, is December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 1 in December transform 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. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in Musselshell?

The coldest month in Musselshell, Montana, is December, with an average high-temperature of 31.1°F (-0.5°C) and an average low-temperature of 18.5°F (-7.5°C).

What is the temperature in December in Musselshell?

The average high-temperature, in December, is 31.1°F (-0.5°C), while the average low-temperature is 18.5°F (-7.5°C). The average heat index (a.k.a. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in July is calculated to be 84.2°F (29°C).

What is the average humidity in December in Musselshell?

In Musselshell, Montana, the average relative humidity in December is 74%.

How many days does it rain in December in Musselshell?

In Musselshell, in December, during 5.5 rainfall days, 0.59" (15mm) of precipitation is typically accumulated.

How much does it snow in Musselshell in December?

In December, in Musselshell, Montana, it is snowing for 9.6 days. Throughout December, 2.72" (69mm) of snow is accumulated.

What is the month with the shortest days in Musselshell?

With an average of 8h and 39min of daylight, December has the shortest days of the year in Musselshell, Montana.

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

The average day length in December is 8h and 39min.

When are sunrise and sunset in December in Musselshell?

On the first day of December in Musselshell, sunrise is at 7:35 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:56 am and sunset at 4:34 pm MST.

What are the months with the least sunshine in Musselshell?

February and December, with an average of 5.2h of sunshine, are months with the least sunshine.

How long on average sun shines in December in Musselshell?

In December, the average sunshine duration in Musselshell is 5.2h.

When is the lowest UV index in Musselshell?

December is the month with the lowest UV index, with an average maximum UV index of 1.

What is the UV index reading in December in Musselshell?

The average daily maximum UV index in December in Musselshell, Montana, is 1. A UV Index value of 2, and less, symbolizes a low health risk from unsafe 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
Musselshell, MT

Average temperature in December - Musselshell, MT
  • Average high temperature in December: 31.1°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (31.1°F).

  • Average low temperature in December: 18.5°F

The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is February (18°F).

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Average pressure in December
Musselshell, MT

Average pressure in December - Musselshell, MT
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed in December
Musselshell, MT

Average wind speed in December - Musselshell, MT
  • Average wind speed in December: 11mph

The windiest month (with the highest average wind speed) is January (11.2mph).
The calmest months (with the lowest average wind speed) are July and August (8.5mph).

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Average humidity in December
Musselshell, MT

Average humidity in December - Musselshell, MT
  • Average humidity in December: 74%

The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is August (39%).

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Average rainfall in December
Musselshell, MT

Average rainfall in December - Musselshell, MT
  • Average rainfall in December: 0.59"

The wettest month (with the highest rainfall) is May (1.97").
The driest month (with the least rainfall) is January (0.55").

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Average rainfall days in December
Musselshell, MT

Average rainfall days in December - Musselshell, MT
  • Average rainfall days in December: 5.5 days

The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (4.6 days).

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Average snowfall in December
Musselshell, MT

Average snowfall in December - Musselshell, MT
  • Average snowfall in December: 2.72"

The month with the highest snowfall is February (3.78").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in December
Musselshell, MT

Average snowfall days in December - Musselshell, MT
  • Average snowfall days in December: 9.6 days

The month with the highest number of snowfall days is February (11.1 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
Musselshell, MT

Average daylight in December / Average sunshine in December - Musselshell, MT
  • Average daylight in December: 8h and 39min

The month with the longest days is June (Average daylight: 15h and 46min).
The month with the shortest days is December (Average daylight: 8h and 39min).

  • Average sunshine in December: 5h and 12min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are February and December (Average sunshine: 5h and 12min).

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Average sunshine days in December
Musselshell, MT

Average sunshine days in December - Musselshell, MT
  • Average sunshine days in December: 17.8 days

The month with the most sunshine days is September (19.5 days).
The month with the least sunshine days is April (12.8 days).

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Average UV index in December
Musselshell, MT

Average UV index in December - Musselshell, MT
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in December
Musselshell, MT

Average cloud cover in December - Musselshell, MT
  • Average cloud cover in December: 45

The month with the most cloud cover is February (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 16).

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Average visibility in December
Musselshell, MT

Average visibility in December - Musselshell, MT
  • 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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