December weather forecast
Big Timber, MT

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Weather in December

December signifies the full arrival of winter with its sub-freezing temperatures, increased snowfall, and shortest daylight hours. While it can be quite cold, relative humidity increases, and it becomes a treat to gaze at snow-covered landscapes. Just before ushering in the new year, December receives 4.61" (117mm) of snow transforming Big Timber into a winter wonderland. Winter sports, snowy walks, and holiday decorations define December. As the year comes to an end, the promise of new beginnings and another cycle of the four distinct seasons becomes palpable.

Temperature

Big Timber's coldest month, December, generally records average temperatures ranging from a high of 28.4°F (-2°C) to a low of 16°F (-8.9°C).

Humidity

The average relative humidity in December in Big Timber is 78%.

Rainfall

In Big Timber, in December, it is raining for 5.3 days, with typically 0.59" (15mm) of accumulated precipitation. Throughout the year, there are 129.6 rainfall days, and 15.83" (402mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Big Timber are January through May, September through December. In Big Timber, Montana, in December, snow falls for 10.5 days, with typically accumulated 4.61" (117mm) of snow. In Big Timber, during the entire year, snow falls for 67.6 days and aggregates up to 38.19" (970mm) of snow.

Daylight

With an average of 8h and 42min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:41 am and sunset at 4:36 pm. On the last day of December, in Big Timber, Montana, sunrise is at 8:01 am and sunset at 4:45 pm MST.

Sunshine

The months with the least sunshine in Big Timber are January, February and December, with an average of 6.2h of sunshine.

UV index

The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index, 2 during December, leads to the following recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
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Frequently asked questions

What month is the coldest in Big Timber?

With average high temperatures of 28.4°F (-2°C) and lows of 16°F (-8.9°C), December is the coldest month.

How cold is December in Big Timber?

In December, in Big Timber, the average high-temperature is 28.4°F (-2°C), and the average low-temperature is 16°F (-8.9°C).

What is the average humidity in December in Big Timber?

In December, the average relative humidity in Big Timber is 78%.

How much does it rain in Big Timber in December?

In Big Timber, Montana, in December, during 5.3 rainfall days, 0.59" (15mm) of precipitation is typically accumulated.

How many days does it snow in December in Big Timber?

In Big Timber, Montana, in December, snow falls for 10.5 days, with typically accumulated 4.61" (117mm) of snow.

What is the month with the shortest days in Big Timber?

The month with the shortest days is December, with an average of 8h and 42min of daylight.

How many hours of daylight does Big Timber have in December?

In December, the average day length is 8h and 44min.

When are sunrise and sunset in December in Big Timber?

On the first day of December, sunrise is at 7:41 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 8:01 am and sunset at 4:45 pm MST.

What are the months with the least sunshine in Big Timber?

January, February and December, with an average of 6.2h of sunshine, are months with the least sunshine in Big Timber.

How long on average sun shines in December in Big Timber?

In December, the average sunshine duration is 6.2h.

What are the months with the lowest UV index in Big Timber?

The months with the lowest UV index in Big Timber are January through April, October through December, with an average maximum UV index of 2.

What is the UV index reading in December in Big Timber?

The average daily maximum UV index in December in Big Timber is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health 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
Big Timber, MT

Average temperature in December - Big Timber, MT
  • Average high temperature in December: 28.4°F

The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is December (28.4°F).

  • Average low temperature in December: 16°F

The month with the highest average low temperature is August (52.9°F).
The coldest month (with the lowest average low temperature) is February (15.3°F).

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Average pressure in December
Big Timber, MT

Average pressure in December - Big Timber, MT
  • Average pressure in December: 30.16"Hg

The months with the highest atmospheric pressure are January and December (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in December
Big Timber, MT

Average wind speed in December - Big Timber, MT
  • Average wind speed in December: 10.5mph

The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).

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Average humidity in December
Big Timber, MT

Average humidity in December - Big Timber, MT
  • Average humidity in December: 78%

The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is August (47%).

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Average rainfall in December
Big Timber, MT

Average rainfall in December - Big Timber, MT
  • Average rainfall in December: 0.59"

The wettest month (with the highest rainfall) is May (3.15").
The driest month (with the least rainfall) is January (0.47").

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Average rainfall days in December
Big Timber, MT

Average rainfall days in December - Big Timber, MT
  • Average rainfall days in December: 5.3 days

The month with the highest number of rainy days is May (19.8 days).
The months with the least rainy days are January and December (5.3 days).

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Average snowfall in December
Big Timber, MT

Average snowfall in December - Big Timber, MT
  • Average snowfall in December: 4.61"

The month with the highest snowfall is March (7.09").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in December
Big Timber, MT

Average snowfall days in December - Big Timber, MT
  • Average snowfall days in December: 10.5 days

The month with the highest number of snowfall days is February (12.9 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
Big Timber, MT

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

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

  • Average sunshine in December: 6h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 12min).

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Average sunshine days in December
Big Timber, MT

Average sunshine days in December - Big Timber, MT
  • Average sunshine days in December: 19.3 days

The month with the most sunshine days is January (19.8 days).
The month with the least sunshine days is May (7.7 days).

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Average UV index in December
Big Timber, MT

Average UV index in December - Big Timber, MT
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

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Average cloud cover in December
Big Timber, MT

Average cloud cover in December - Big Timber, MT
  • Average cloud cover in December: 37

The month with the most cloud cover is February (Cloud cover 41).
The months with the least cloud cover are July and August (Cloud cover 16).

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Average visibility in December
Big Timber, MT

Average visibility in December - Big Timber, 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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Big Timber, Montana, USA

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