December weather forecast
Mosby, MT

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Weather in December

The first month of the winter, December, is also a subzero cold month in Mosby, Montana, with an average temperature ranging between max 31.1°F (-0.5°C) and min 18.5°F (-7.5°C).

Temperature

December is the month when Mosby, Montana, sees the lowest average temperatures, with a high of 31.1°F (-0.5°C) and a low of 18.5°F (-7.5°C).

Humidity

The average relative humidity in December in Mosby is 74%.

Rainfall

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

Snowfall

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

Daylight

The month with the shortest days in Mosby is December, with an average of 8h and 36min of daylight.
On the first day of the month, sunrise is at 7:37 am and sunset at 4:24 pm. On the last day of December, in Mosby, sunrise is at 7:57 am and sunset at 4:32 pm MST.

Sunshine

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

UV index

December is the month with the lowest UV index in Mosby, Montana, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 1 during December translates into the following guidance:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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Frequently asked questions

What is the coldest month in Mosby?

December is Mosby's coldest month, registering average high temperatures of 31.1°F (-0.5°C) and lows of 18.5°F (-7.5°C).

How cold is December in Mosby?

Mosby in December has an average high-temperature of 31.1°F (-0.5°C) and an average low-temperature of 18.5°F (-7.5°C). In July, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is evaluated at 84.2°F (29°C).

What is the average humidity in December in Mosby?

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

How much does it rain in Mosby in December?

In Mosby, in December, it is raining for 5.5 days, with typically 0.59" (15mm) of accumulated precipitation.

How many days does it snow in December in Mosby?

In Mosby, Montana, in December, during 9.6 snowfall days, 2.72" (69mm) of snow is typically accumulated.

What is the month with the shortest days in Mosby?

With an average of 8h and 36min of daylight, December has the shortest days of the year.

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

In December, the average day length is 8h and 35min.

When are sunrise and sunset in December in Mosby?

On the first day of December in Mosby, sunrise is at 7:37 am and sunset at 4:24 pm. On the last day of the month, sunrise is at 7:57 am and sunset at 4:32 pm MST.

What is the month with the least sunshine in Mosby?

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

How many hours of sunshine does Mosby have in December?

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

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

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

What is the UV index intensity in December in Mosby?

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

Average temperature in December - Mosby, 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
Mosby, MT

Average pressure in December - Mosby, 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
Mosby, MT

Average wind speed in December - Mosby, 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
Mosby, MT

Average humidity in December - Mosby, 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
Mosby, MT

Average rainfall in December - Mosby, 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
Mosby, MT

Average rainfall days in December - Mosby, 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
Mosby, MT

Average snowfall in December - Mosby, 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
Mosby, MT

Average snowfall days in December - Mosby, 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
Mosby, MT

Average daylight in December / Average sunshine in December - Mosby, MT
  • Average daylight in December: 8h and 4min

The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).

  • Average sunshine in December: 5h and 1min

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
Mosby, MT

Average sunshine days in December - Mosby, 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
Mosby, MT

Average UV index in December - Mosby, 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
Mosby, MT

Average cloud cover in December - Mosby, 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
Mosby, MT

Average visibility in December - Mosby, 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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Mosby, Montana, USA

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