December weather forecast
Polaris, MT

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Weather in December

The first month of the winter, December, is also a subzero cold month in Polaris, Montana, with an average temperature varying between 25.2°F (-3.8°C) and 10.6°F (-11.9°C).

Temperature

Polaris's December weather, with an average high temperature of 25.2°F (-3.8°C) and an average low temperature of 10.6°F (-11.9°C), tends to be the coldest of the year.

Humidity

In December, the average relative humidity is 85%.

Rainfall

In Polaris, Montana, in December, during 8.9 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. In Polaris, during the entire year, the rain falls for 126.7 days and collects up to 10.35" (263mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall. In December, in Polaris, it is snowing for 14 days. Throughout December, 4.45" (113mm) of snow is accumulated. In Polaris, during the entire year, snow falls for 81.2 days and aggregates up to 29.76" (756mm) of snow.

Daylight

With an average of 8h and 48min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:52 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 8:11 am and sunset at 4:59 pm MST.

Sunshine

The month with the least sunshine in Polaris, Montana, is December, with an average of 6.1h of sunshine.

UV index

In December, the average daily maximum UV index in Polaris, Montana, is 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The daily maximum UV index of 2 in December interprets into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
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Frequently asked questions

What part of the year is the coldest in Polaris?

December is Polaris's coldest month, registering average high temperatures of 25.2°F (-3.8°C) and lows of 10.6°F (-11.9°C).

How cold is it in Polaris in December?

In December, the average high-temperature and low-temperature in Polaris are 25.2°F (-3.8°C) and 10.6°F (-11.9°C) respectively.

What is the average humidity in December in Polaris?

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

How much does it rain in Polaris in December?

In Polaris, during December, the rain falls for 8.9 days and regularly aggregates up to 0.63" (16mm) of precipitation.

How many days does it snow in December in Polaris?

In Polaris, Montana, in December, during 14 snowfall days, 4.45" (113mm) of snow is typically accumulated.

What is the month with the shortest days in Polaris?

The month with the shortest days in Polaris, Montana, is December, with an average of 8h and 48min of daylight.

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

In Polaris, Montana, the average day length in December is 8h and 47min.

What time are sunrise and sunset in December in Polaris?

In December, on the first day of the month, sunrise is at 7:52 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 8:11 am and sunset at 4:59 pm MST.

What is the month with the least sunshine in Polaris?

The month with the least sunshine in Polaris is December, with an average of 6.1h of sunshine.

How long on average sun shines in December in Polaris?

The average sunshine duration in December is 6.1h.

What is the UV index intensity in December in Polaris?

In December, the average daily maximum UV index in Polaris, Montana, 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
Polaris, MT

Average temperature in December - Polaris, MT
  • Average high temperature in December: 25.2°F

The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is December (25.2°F).

  • Average low temperature in December: 10.6°F

The month with the highest average low temperature is July (47.5°F).
The coldest month (with the lowest average low temperature) is December (10.6°F).

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Average pressure in December
Polaris, MT

Average pressure in December - Polaris, MT
  • Average pressure in December: 30.23"Hg

The month with the highest atmospheric pressure is January (30.24"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in December
Polaris, MT

Average wind speed in December - Polaris, MT
  • Average wind speed in December: 6.5mph

The windiest month (with the highest average wind speed) is November (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in December
Polaris, MT

Average humidity in December - Polaris, MT
  • Average humidity in December: 85%

The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are July and August (45%).

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Average rainfall in December
Polaris, MT

Average rainfall in December - Polaris, MT
  • Average rainfall in December: 0.63"

The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is January (0.51").

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Average rainfall days in December
Polaris, MT

Average rainfall days in December - Polaris, MT
  • Average rainfall days in December: 8.9 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (7.7 days).

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Average snowfall in December
Polaris, MT

Average snowfall in December - Polaris, MT
  • Average snowfall in December: 4.45"

The month with the highest snowfall is February (5.51").
The months with the least snowfall are July and August (0").

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Average snowfall days in December
Polaris, MT

Average snowfall days in December - Polaris, MT
  • Average snowfall days in December: 14 days

The month with the highest number of snowfall days is February (14.1 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight in December /
Average sunshine in December
Polaris, MT

Average daylight in December / Average sunshine in December - Polaris, MT
  • Average daylight in December: 8h and 5min

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

  • Average sunshine in December: 6h and 1min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).

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Average sunshine days in December
Polaris, MT

Average sunshine days in December - Polaris, MT
  • Average sunshine days in December: 15.5 days

The month with the most sunshine days is July (18.2 days).
The month with the least sunshine days is April (10.1 days).

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Average UV index in December
Polaris, MT

Average UV index in December - Polaris, MT
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is February (UV index 1).

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Average cloud cover in December
Polaris, MT

Average cloud cover in December - Polaris, MT
  • Average cloud cover in December: 40

The month with the most cloud cover is February (Cloud cover 42).
The months with the least cloud cover are July and August (Cloud cover 13).

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Average visibility in December
Polaris, MT

Average visibility in December - Polaris, MT
  • Average visibility in December: 5mi

The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).

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Polaris, Montana, USA

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