December weather forecast
Carter, MT

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Weather in December

The first month of the winter, December, is still a freezing cold month in Carter, Montana, with an average temperature fluctuating between 29.8°F (-1.2°C) and 18.5°F (-7.5°C).

Temperature

December, having an average high-temperature of 29.8°F (-1.2°C) and an average low-temperature of 18.5°F (-7.5°C), is the coldest month.

Humidity

The average relative humidity in December in Carter is 76%.

Rainfall

The month with the least rainfall is December, when the rain falls for 5.8 days and typically collects 0.67" (17mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall. In December, it is snowing for 10.7 days. Throughout December, 4.61" (117mm) of snow is accumulated. Throughout the year, in Carter, there are 58.3 snowfall days, and 29.37" (746mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 8h and 30min of daylight.
On the first day of the month, sunrise is at 7:52 am and sunset at 4:33 pm. On the last day of December, sunrise is at 8:12 am and sunset at 4:41 pm MST.

Sunshine

January, February and December, with an average of 5.5h of sunshine, are months with the least sunshine in Carter.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In December, the maximum UV index of 2 suggests these recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest in Carter?

Carter experiences its lowest temperatures in December, with an average peak of 29.8°F (-1.2°C) and a low of 18.5°F (-7.5°C).

How cold is it in Carter in December?

During December, Carter experiences an average high-temperature of 29.8°F (-1.2°C) and a low-temperature of 18.5°F (-7.5°C). In July, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, is evaluated at 82.4°F (28°C).

What is the average humidity in December in Carter?

The average relative humidity in December is 76%.

What is the driest month in Carter?

December is the month with the least rainfall in Carter. Rain falls for 5.8 days and accumulates 0.67" (17mm) of precipitation.

How many days does it rain in December in Carter?

In December, in Carter, the rain falls for 5.8 days. Throughout December, 0.67" (17mm) of precipitation is accumulated.

How much does it snow in Carter in December?

In December, in Carter, it is snowing for 10.7 days. Throughout December, 4.61" (117mm) of snow is accumulated.

What is the month with the shortest days in Carter?

With an average of 8h and 30min of daylight, December has the shortest days of the year.

How many hours of daylight does Carter have in December?

The average day length in December in Carter is 8h and 29min.

When is the sunrise / sunset in December in Carter?

In December, on the first day of the month, sunrise is at 7:52 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 8:12 am and sunset at 4:41 pm MST.

What is the month with the least sunshine in Carter?

January, February and December, with an average of 5.5h of sunshine, are months with the least sunshine in Carter.

How many hours of sunshine does Carter have in December?

The average sunshine duration in December in Carter is 5.5h.

When is the lowest UV index in Carter?

The months with the lowest UV index in Carter are January through March, November and December, with an average maximum UV index of 2.

How high is the UV index in December in Carter?

The average daily maximum UV index in December in Carter, Montana, is 2. A UV Index value of 2, and less, symbolizes a low health risk from 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
Carter, MT

Average temperature in December - Carter, MT
  • Average high temperature in December: 29.8°F

The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is December (29.8°F).

  • Average low temperature in December: 18.5°F

The month with the highest average low temperature is August (60.4°F).
The coldest month (with the lowest average low temperature) is February (18.1°F).

Average pressure in December
Carter, MT

Average pressure in December - Carter, MT
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

Average wind speed in December
Carter, MT

Average wind speed in December - Carter, MT
  • Average wind speed in December: 10.4mph

The windiest months (with the highest average wind speed) are January and November (10.7mph).
The calmest month (with the lowest average wind speed) is August (8.1mph).

Average humidity in December
Carter, MT

Average humidity in December - Carter, MT
  • Average humidity in December: 76%

The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is August (39%).

Average rainfall in December
Carter, MT

Average rainfall in December - Carter, MT
  • Average rainfall in December: 0.67"

The wettest month (with the highest rainfall) is June (2.05").
The driest month (with the least rainfall) is December (0.67").

Average rainfall days in December
Carter, MT

Average rainfall days in December - Carter, MT
  • Average rainfall days in December: 5.8 days

The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (5.3 days).

Average snowfall in December
Carter, MT

Average snowfall in December - Carter, MT
  • Average snowfall in December: 4.61"

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

Average snowfall days in December
Carter, MT

Average snowfall days in December - Carter, MT
  • Average snowfall days in December: 10.7 days

The month with the highest number of snowfall days is February (12.2 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in December / Average sunshine in December - Carter, MT
  • Average daylight in December: 8h and 3min

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in December: 5h and 3min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 30min).

Average sunshine days in December
Carter, MT

Average sunshine days in December - Carter, MT
  • Average sunshine days in December: 17.8 days

The month with the most sunshine days is September (19.3 days).
The month with the least sunshine days is April (11.2 days).

Average UV index in December
Carter, MT

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

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

Average cloud cover in December
Carter, MT

Average cloud cover in December - Carter, MT
  • Average cloud cover in December: 42

The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 14).

Average visibility in December
Carter, MT

Average visibility in December - Carter, 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).

Carter, Montana, USA

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