December weather forecast and climate
Sand Coulee, MT

Weather in December

The first month of the winter, December, is also a subzero cold month in Sand Coulee, Montana, with average temperature ranging between min 18.5°F (-7.5°C) and max 30°F (-1.1°C).

Temperature

The coldest month is December, with an average high-temperature of 30°F (-1.1°C) and an average low-temperature of 18.5°F (-7.5°C).

Humidity

The average relative humidity in December is 75%.

Rainfall

In Sand Coulee, during December, the rain falls for 4 days and regularly aggregates up to 0.59" (15mm) of precipitation. Throughout the year, in Sand Coulee, Montana, there are 85.3 rainfall days, and 9.84" (250mm) of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall in Sand Coulee. In Sand Coulee, snow falls for 11 days, with typically accumulated 3.94" (100mm) of snow. In Sand Coulee, during the entire year, snow falls for 58.9 days, and aggregates up to 28.54" (725mm) of snow.

Daylight

With an average of 8.5h of daylight, December has the shortest days of the year.

Sunshine

Months with the least sunshine in Sand Coulee are January, February and December, with an average of 5.6h of sunshine.

UV index

Months with the lowest UV index in Sand Coulee, Montana, are January through March, October through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 2 interpret into the following advice:
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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Sand Coulee?

With an average high-temperature of 30°F (-1.1°C) and an average low-temperature of 18.5°F (-7.5°C), December is the coldest month in Sand Coulee.

What is the temperature in December in Sand Coulee?

In December, in Sand Coulee, the average high-temperature is 30°F (-1.1°C), and the average low-temperature is 18.5°F (-7.5°C).

What is the average humidity in December in Sand Coulee?

In December, the average relative humidity in Sand Coulee is 75%.

How many days does it rain in December in Sand Coulee?

In Sand Coulee, Montana, during December, the rain falls for 4 days and regularly aggregates up to 0.59" (15mm) of precipitation.

How many days does it snow in December in Sand Coulee?

In December, it is snowing for 11 days. Throughout December, 3.94" (100mm) of snow is accumulated.

What is the month with the shortest days in Sand Coulee?

December has the shortest days of the year, with an average of 8.5h of daylight.

How many hours of daylight does Sand Coulee have in December?

In December, the average length of the day in Sand Coulee, Montana, is 8.5h.

What is the month with the least sunshine in Sand Coulee?

January, February and December, with an average of 5.6h of sunshine, are months with the least sunshine in Sand Coulee, Montana.

How long on average sun shines in December in Sand Coulee?

In Sand Coulee, Montana, the average sunshine in December is 5.6h.

What are the months with the lowest UV index in Sand Coulee?

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Sand Coulee.

How high is the UV index in December in Sand Coulee?

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from unprotected exposure to the UV radiation.

Average temperature in December
Sand Coulee, MT

Average temperature in December - Sand Coulee, MT
  • Average high temperature in December: 30°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is December (30°F).

  • Average low temperature in December: 18.5°F

The month with the highest average low temperature is August (58.5°F).
The coldest month (with the lowest average low temperature) is February (18.3°F).

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Average pressure in December
Sand Coulee, MT

Average pressure in December - Sand Coulee, MT
  • Average pressure in December: 30.13"

The month with the highest atmospheric pressure is January (30.14").
The month with the lowest atmospheric pressure is June (29.87").

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Average wind speed in December
Sand Coulee, MT

Average wind speed in December - Sand Coulee, MT
  • Average wind speed in December: 11.1mph

The windiest months (with the highest average wind speed) are January and November (11.4mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).

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Average humidity in December
Sand Coulee, MT

Average humidity in December - Sand Coulee, MT
  • Average humidity in December: 75%

The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is August (40%).

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Average rainfall in December
Sand Coulee, MT

Average rainfall in December - Sand Coulee, MT
  • Average rainfall in December: 0.59"

The wettest month (with the highest rainfall) is June (1.57").
The driest month (with the least rainfall) is July (0.47").

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Average rainfall days in December
Sand Coulee, MT

Average rainfall days in December - Sand Coulee, MT
  • Average rainfall days in December: 4 days

The month with the highest number of rainy days is May (11.7 days).
Months with the least rainy days are November and December (4 days).

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Average snowfall in December
Sand Coulee, MT

Average snowfall in December - Sand Coulee, MT
  • Average snowfall in December: 3.94"

The month with the highest snowfall is February (5.67").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in December
Sand Coulee, MT

Average snowfall days in December - Sand Coulee, MT
  • Average snowfall days in December: 11 days

The month with the highest number of snowfall days is February (12.9 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
Sand Coulee, MT

Average daylight in December / Average sunshine in December - Sand Coulee, MT
  • Average daylight in December: 8.5h

The month with the longest days is June (Average daylight: 15.9h).
The month with the shortest days is December (Average daylight: 8.5h).

  • Average sunshine in December: 5.6h

The month with the most sunshine is July (Average sunshine: 12.1h).
Months with the least sunshine are January, February and December (Average sunshine: 5.6).

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Average sunshine days in December
Sand Coulee, MT

Average sunshine days in December - Sand Coulee, MT
  • Average sunshine days in December: 18.8 days

The month with the most sunshine days is July (24.2 days).
The month with the least sunshine days is February (12.4 days).

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Average UV index in December
Sand Coulee, MT

Average UV index in December - Sand Coulee, MT
  • Average UV index in December: 2

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

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Average cloud cover in December
Sand Coulee, MT

Average cloud cover in December - Sand Coulee, MT
  • Average cloud cover in December: 41

The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 13).

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Average visibility in December
Sand Coulee, MT

Average visibility in December - Sand Coulee, 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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