December weather forecast
Colstrip, MT

Weather in December

December, the first month of the winter, in Colstrip, is still a freezing cold month, with average temperature fluctuating between 16.7°F (-8.5°C) and 30.4°F (-0.9°C).

Temperature

The coldest month is December, with an average high-temperature of 30.4°F (-0.9°C) and an average low-temperature of 16.7°F (-8.5°C).

Humidity

In December, the average relative humidity in Colstrip is 77%.

Rainfall

The month with the least rainfall in Colstrip is December when the rain falls for 3.4 days and typically collects 0.47" (12mm) of precipitation.

Snowfall

Months with snowfall in Colstrip are January through June, September through December. In Colstrip, during 9.3 snowfall days, 3.15" (80mm) of snow is typically accumulated. Throughout the year, in Colstrip, there are 55.2 snowfall days, and 23.5" (597mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 8.7h of daylight.

Sunshine

The average sunshine in Colstrip is 5.4h.

UV index

Months with the lowest UV index in Colstrip are January through April, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. 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 Colstrip?

The coldest month in Colstrip, Montana, is December, with an average high-temperature of 30.4°F (-0.9°C) and an average low-temperature of 16.7°F (-8.5°C).

What is the average humidity in December in Colstrip?

In Colstrip, Montana, the average relative humidity in December is 77%.

What is the driest month in Colstrip?

December is the month with the least rainfall. Rain falls for 3.4 days and accumulates 0.47" (12mm) of precipitation.

How many days does it rain in December in Colstrip?

In Colstrip, Montana, during December, the rain falls for 3.4 days and regularly aggregates up to 0.47" (12mm) of precipitation.

How many days does it snow in December in Colstrip?

In December, in Colstrip, Montana, it is snowing for 9.3 days. Throughout December, 3.15" (80mm) of snow is accumulated.

What is the month with the shortest days in Colstrip?

With an average of 8.7h of daylight, December has the shortest days of the year in Colstrip.

How many hours of daylight does Colstrip have in December?

In December, the average length of the day in Colstrip, Montana, is 8.7h.

How long on average sun shines in December in Colstrip?

In Colstrip, Montana, the average sunshine in December is 5.4h.

What are the months with the lowest UV index in Colstrip?

Months with the lowest UV index in Colstrip are January through April, November and December, with an average maximum UV index of 2.

What is the UV index intensity in December in Colstrip?

The average daily maximum UV index in December in Colstrip, Montana, is 2. A UV Index of 2, and less, symbolizes a low health threat from the exposure to the Sun's UV rays.

Average temperature in December
Colstrip, MT

Average temperature in December - Colstrip, MT
  • Average high temperature in December: 30.4°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is December (30.4°F).

  • Average low temperature in December: 16.7°F

The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (16°F).

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Average pressure in December
Colstrip, MT

Average pressure in December - Colstrip, MT
  • Average pressure in December: 30.12"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is June (29.84").

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Average wind speed in December
Colstrip, MT

Average wind speed in December - Colstrip, MT
  • Average wind speed in December: 8.2mph

The windiest month (with the highest average wind speed) is April (10mph).
The calmest months (with the lowest average wind speed) are July and August (7.8mph).

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Average humidity in December
Colstrip, MT

Average humidity in December - Colstrip, MT
  • Average humidity in December: 77%

The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (42%).

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Average rainfall in December
Colstrip, MT

Average rainfall in December - Colstrip, MT
  • Average rainfall in December: 0.47"

The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is December (0.47").

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Average rainfall days in December
Colstrip, MT

Average rainfall days in December - Colstrip, MT
  • Average rainfall days in December: 3.4 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (2.8 days).

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Average snowfall in December
Colstrip, MT

Average snowfall in December - Colstrip, MT
  • Average snowfall in December: 3.15"

The month with the highest snowfall is February (4.33").
Months with the least snowfall are July and August (0").

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Average snowfall days in December
Colstrip, MT

Average snowfall days in December - Colstrip, MT
  • Average snowfall days in December: 9.3 days

The month with the highest number of snowfall days is February (10.4 days).
Months with the least snowfall days are July and August (0 days).

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

Average daylight in December / Average sunshine in December - Colstrip, MT
  • Average daylight in December: 8.7h

The month with the longest days is June (Average daylight: 15.7h).
The month with the shortest days is December (Average daylight: 8.7h).

  • Average sunshine in December: 5.4h

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is February (Average sunshine: 5h).

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Average sunshine days in December
Colstrip, MT

Average sunshine days in December - Colstrip, MT
  • Average sunshine days in December: 20.5 days

The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (11.3 days).

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Average UV index in December
Colstrip, MT

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

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are January, February, March, April, November and December (UV index 2).

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Average cloud cover in December
Colstrip, MT

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

The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 15).

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Average visibility in December
Colstrip, MT

Average visibility in December - Colstrip, MT
  • Average visibility in December: 6mi

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

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