December weather forecast
Starr School, MT

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Weather in December

December, the first month of the winter in Starr School, is still a freezing cold month, with an average temperature fluctuating between 11.3°F (-11.5°C) and 23.2°F (-4.9°C).

Temperature

In Starr School, Montana, December is the coldest month, with temperatures averaging a high of 23.2°F (-4.9°C) and a low of 11.3°F (-11.5°C).

Humidity

The average relative humidity in December in Starr School is 92%.

Rainfall

In Starr School, during December, the rain falls for 5.5 days and regularly aggregates up to 2.48" (63mm) of precipitation. In Starr School, during the entire year, the rain falls for 118.6 days and collects up to 20.75" (527mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall in Starr School, Montana. In Starr School, Montana, during December, snow falls for 22.8 days and regularly aggregates up to 19.17" (487mm) of snow. Throughout the year, in Starr School, there are 128.7 snowfall days, and 92.13" (2340mm) of snow is accumulated.

Daylight

With an average of 8h and 24min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 8:04 am and sunset at 4:39 pm. On the last day of December, sunrise is at 8:24 am and sunset at 4:47 pm MST.

Sunshine

In December, the average sunshine is 3.2h.

UV index

January through March, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Starr School, Montana. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index of 1 during December leads to these instructions:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. 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 Starr School?

With average high and low temperatures of 23.2°F (-4.9°C) and 11.3°F (-11.5°C) respectively, December is Starr School's coldest month.

How cold is it in Starr School in December?

The high-temperature during December is 23.2°F (-4.9°C) and the low-temperature is 11.3°F (-11.5°C).

What is the average humidity in December in Starr School?

The average relative humidity in December in Starr School is 92%.

How much does it rain in Starr School in December?

In December, in Starr School, Montana, the rain falls for 5.5 days. Throughout December, 2.48" (63mm) of precipitation is accumulated.

How many days does it snow in December in Starr School?

In Starr School, during December, snow falls for 22.8 days and regularly aggregates up to 19.17" (487mm) of snow.

What is the month with the shortest days in Starr School?

The month with the shortest days is December, with an average of 8h and 24min of daylight.

What is the average length of the day in December in Starr School?

In December, the average day length in Starr School is 8h and 22min.

When is the sunrise / sunset in December in Starr School?

In December, on the first day of the month, sunrise is at 8:04 am and sunset at 4:39 pm. On the last day of the month, in Starr School, sunrise is at 8:24 am and sunset at 4:47 pm MST.

How many hours of sunshine does Starr School have in December?

In December, the average sunshine duration in Starr School, Montana, is 3.2h.

When is the lowest UV index in Starr School?

The months with the lowest UV index in Starr School, Montana, are January through March, November and December, with an average maximum UV index of 1.

What is the UV index reading in December in Starr School?

The average daily maximum UV index in December in Starr School is 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability 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
Starr School, MT

Average temperature in December - Starr School, MT
  • Average high temperature in December: 23.2°F

The warmest month (with the highest average high temperature) is July (73°F).
The month with the lowest average high temperature is December (23.2°F).

  • Average low temperature in December: 11.3°F

The months with the highest average low temperature are July and August (44.2°F).
The coldest month (with the lowest average low temperature) is February (10.9°F).

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Average pressure in December
Starr School, MT

Average pressure in December - Starr School, MT
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed in December
Starr School, MT

Average wind speed in December - Starr School, MT
  • Average wind speed in December: 6.6mph

The windiest month (with the highest average wind speed) is November (7mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

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Average humidity in December
Starr School, MT

Average humidity in December - Starr School, MT
  • Average humidity in December: 92%

The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is August (56%).

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Average rainfall in December
Starr School, MT

Average rainfall in December - Starr School, MT
  • Average rainfall in December: 2.48"

The wettest month (with the highest rainfall) is January (2.56").
The driest month (with the least rainfall) is August (0.71").

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Average rainfall days in December
Starr School, MT

Average rainfall days in December - Starr School, MT
  • Average rainfall days in December: 5.5 days

The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (4.3 days).

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Average snowfall in December
Starr School, MT

Average snowfall in December - Starr School, MT
  • Average snowfall in December: 19.17"

The month with the highest snowfall is January (20.16").
The months with the least snowfall are July and August (0").

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Average snowfall days in December
Starr School, MT

Average snowfall days in December - Starr School, MT
  • Average snowfall days in December: 22.8 days

The month with the highest number of snowfall days is December (22.8 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
Starr School, MT

Average daylight in December / Average sunshine in December - Starr School, MT
  • Average daylight in December: 8h and 2min

The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).

  • Average sunshine in December: 3h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).

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Average sunshine days in December
Starr School, MT

Average sunshine days in December - Starr School, MT
  • Average sunshine days in December: 8 days

The month with the most sunshine days is August (19.6 days).
The month with the least sunshine days is February (7.2 days).

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Average UV index in December
Starr School, MT

Average UV index in December - Starr School, MT
  • 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, November and December (UV index 1).

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Average cloud cover in December
Starr School, MT

Average cloud cover in December - Starr School, MT
  • Average cloud cover in December: 70

The month with the most cloud cover is January (Cloud cover 71).
The months with the least cloud cover are July and August (Cloud cover 17).

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Average visibility in December
Starr School, MT

Average visibility in December - Starr School, MT
  • Average visibility in December: 4mi

The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).

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Starr School, Montana, USA

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