December weather forecast and climate
Culbertson, MT

December, the first month of the winter, in Culbertson, is also a subzero cold month, with average temperature ranging between min 12.7°F (-10.7°C) and max 24.6°F (-4.1°C).

Temperature

In December, the average high-temperature plummets, from a cold 39.4°F (4.1°C) in November, to a subzero cold 24.6°F (-4.1°C). In Culbertson, the average low-temperature is 12.7°F (-10.7°C).

Humidity

The average relative humidity in December is 84%.

Rainfall

In Culbertson, during December, the rain falls for 3.5 days and regularly aggregates up to 0.31" (8mm) of precipitation. In Culbertson, during the entire year, the rain falls for 85.7 days and collects up to 8.5" (216mm) of precipitation.

Snowfall

Months with snowfall in Culbertson are January through May, October through December. In Culbertson, during 11.2 snowfall days, 1.65" (42mm) of snow is typically accumulated. In Culbertson, during the entire year, snow falls for 56.1 days, and aggregates up to 8.94" (227mm) of snow.

Daylight

With an average of 8.4h of daylight, December has the shortest days of the year in Culbertson, Montana.

Sunshine

In Culbertson, the average sunshine is 4.5h.

UV index

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to the UV radiation for the ordinary person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to 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.

What is the temperature in December in Culbertson?

The average high-temperature, in December, in Culbertson, Montana, is 24.6°F (-4.1°C), while the average low-temperature is 12.7°F (-10.7°C).

What is the average humidity in December in Culbertson?

In December, the average relative humidity is 84%.

How much does it rain in Culbertson in December?

In December, in Culbertson, the rain falls for 3.5 days. Throughout December, 0.31" (8mm) of precipitation is accumulated.

How much does it snow in Culbertson in December?

In Culbertson, during December, snow falls for 11.2 days and regularly aggregates up to 1.65" (42mm) of snow.

What is the month with the shortest days in Culbertson?

December has the shortest days of the year in Culbertson, with an average of 8.4h of daylight.

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

The average length of the day in December in Culbertson is 8.4h.

How many hours of sunshine does Culbertson have in December?

In Culbertson, the average sunshine in December is 4.5h.

What is the UV index intensity in December in Culbertson?

In December, the average daily maximum UV index in Culbertson 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 - Culbertson, MT
  • Average high temperature in December: -4.1°C

The warmest month (with the highest average high temperature) is July (29°C).
The month with the lowest average high temperature is January (-4.8°C).

  • Average low temperature in December: -10.7°C

The month with the highest average low temperature is July (17.2°C).
The coldest month (with the lowest average low temperature) is January (-12.3°C).

Average pressure in December - Culbertson, MT
  • Average pressure in December: 1020.5mbar

The month with the highest atmospheric pressure is February (1021.5mbar).
The month with the lowest atmospheric pressure is June (1010.3mbar).

Average wind speed in December - Culbertson, MT
  • Average wind speed in December: 16.1km/h

The windiest month (with the highest average wind speed) is April (17.9km/h).
The calmest month (with the lowest average wind speed) is February (14.8km/h).

Average humidity in December - Culbertson, MT
  • Average humidity in December: 84%

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (45%).

Average rainfall in December - Culbertson, MT
  • Average rainfall in December: 8mm

The wettest month (with the highest rainfall) is July (34mm).
The driest month (with the least rainfall) is January (6mm).

Average rainfall days in December - Culbertson, MT
  • Average rainfall days in December: 3.5 days

The month with the highest number of rainy days is June (11.4 days).
Months with the least rainy days are January and February (3.2 days).

Average snowfall in December - Culbertson, MT
  • Average snowfall in December: 42mm

The month with the highest snowfall is February (45mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in December - Culbertson, MT
  • Average snowfall days in December: 11.2 days

The month with the highest number of snowfall days is February (12 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December / Average sunshine in December - Culbertson, MT
  • Average daylight in December: 8.4h

The month with the longest days is June (Average daylight: 16h).
The month with the shortest days is December (Average daylight: 8.4h).

  • Average sunshine in December: 4.5h

The month with the most sunshine is July (Average sunshine: 11.7h).
The month with the least sunshine is February (Average sunshine: 4.3h).

Average sunshine days in December - Culbertson, MT
  • Average sunshine days in December: 18.7 days

The month with the most sunshine days is September (20.7 days).
The month with the least sunshine days is April (15.8 days).

Average UV index in December - Culbertson, 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 and February (UV index 1).

Average cloud cover in December - Culbertson, MT
  • Average cloud cover in December: 53

The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 18).

Average visibility in December - Culbertson, MT
  • Average visibility in December: 9km

Months with the highest visibility are May, June, July, August, September and October (10km).
Months with the lowest visibility are January, February, March, April, November and December (9km).