December weather forecast
White Sulphur Springs, MT

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Weather in December

December in White Sulphur Springs is a full-fledged winter month. The chilling weather conditions continue with an average high temperature of 25.3°F (-3.7°C) and an average snowfall of 5.47" (139mm). The daylight hours are the shortest in the year, a distinctive characteristic of the winter solstice. Frozen landscape, heavy clothing, snow-covered streets, holiday decorations, and festive spirit mark the grandeur of December and the year-end in Montana.

Temperature

The lowest temperatures are recorded in December, with averages reaching a high of 25.3°F (-3.7°C) and a low of 10.9°F (-11.7°C).

Humidity

The average relative humidity in December is 87%.

Rainfall

In December, the rain falls for 5 days. Throughout December, 0.67" (17mm) of precipitation is accumulated. In White Sulphur Springs, during the entire year, the rain falls for 103.1 days and collects up to 13.31" (338mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall. In White Sulphur Springs, in December, snow falls for 12.8 days, with typically accumulated 5.47" (139mm) of snow. In White Sulphur Springs, during the entire year, snow falls for 97.8 days and aggregates up to 52.68" (1338mm) of snow.

Daylight

The month with the shortest days in White Sulphur Springs is December, with an average of 8h and 36min of daylight.
On the first day of December, sunrise is at 7:47 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 8:07 am and sunset at 4:46 pm MST.

Sunshine

In White Sulphur Springs, the average sunshine in December is 5.7h.

UV index

January, February and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 1 in December converts into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Updated: Jun 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the coldest months?

White Sulphur Springs notes the coldest temperatures in December, with a average high of 25.3°F (-3.7°C) and a low of 10.9°F (-11.7°C).

How cold is it in December?

During December, White Sulphur Springs experiences an average high-temperature of 25.3°F (-3.7°C) and a low-temperature of 10.9°F (-11.7°C).

What is the average humidity in December?

In December, the average relative humidity is 87%.

How much does it rain in December?

In White Sulphur Springs, in December, during 5 rainfall days, 0.67" (17mm) of precipitation is typically accumulated.

How much does it snow in White Sulphur Springs in December?

In White Sulphur Springs, in December, during 12.8 snowfall days, 5.47" (139mm) of snow is typically accumulated.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 8h and 36min of daylight.

What is the average length of the day in December?

The average day length in December is 8h and 39min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:47 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 8:07 am and sunset at 4:46 pm MST.

How many hours of sunshine does White Sulphur Springs have in December?

In December, the average sunshine duration is 5.7h.

When is the lowest UV index?

January, February and December, with an average maximum UV index of 1, are months with the lowest UV index.

What is the UV index reading in December?

In White Sulphur Springs, the average daily maximum UV index in December is 1. A UV Index estimate of 2, and below, represents a minimal hazard to health from exposure to the Sun's UV radiation.
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
White Sulphur Springs, MT

Average temperature in December - White Sulphur Springs, MT
  • Average high temperature in December: 25.3°F

The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is December (25.3°F).

  • Average low temperature in December: 10.9°F

The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is December (10.9°F).

Average pressure in December
White Sulphur Springs, MT

Average pressure in December - White Sulphur Springs, MT
  • Average pressure in December: 30.17"Hg

The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

Average wind speed in December
White Sulphur Springs, MT

Average wind speed in December - White Sulphur Springs, MT
  • Average wind speed in December: 5.6mph

The windiest month (with the highest average wind speed) is April (5.9mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

Average humidity in December
White Sulphur Springs, MT

Average humidity in December - White Sulphur Springs, MT
  • Average humidity in December: 87%

The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is August (48%).

Average rainfall in December
White Sulphur Springs, MT

Average rainfall in December - White Sulphur Springs, MT
  • Average rainfall in December: 0.67"

The wettest month (with the highest rainfall) is May (2.05").
The driest month (with the least rainfall) is January (0.59").

Average rainfall days in December
White Sulphur Springs, MT

Average rainfall days in December - White Sulphur Springs, MT
  • Average rainfall days in December: 5 days

The month with the highest number of rainy days is May (15.1 days).
The month with the least rainy days is November (3.8 days).

Average snowfall in December
White Sulphur Springs, MT

Average snowfall in December - White Sulphur Springs, MT
  • Average snowfall in December: 5.47"

The month with the highest snowfall is February (9.61").
The months with the least snowfall are July and August (0").

Average snowfall days in December
White Sulphur Springs, MT

Average snowfall days in December - White Sulphur Springs, MT
  • Average snowfall days in December: 12.8 days

The month with the highest number of snowfall days is February (16.5 days).
The months with the least snowfall days are July and August (0 days).

Average daylight in December /
Average sunshine in December
White Sulphur Springs, MT

Average daylight in December / Average sunshine in December - White Sulphur Springs, MT
  • Average daylight in December: 8h and 4min

The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).

  • Average sunshine in December: 5h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).

Average sunshine days in December
White Sulphur Springs, MT

Average sunshine days in December - White Sulphur Springs, MT
  • Average sunshine days in December: 17.6 days

The month with the most sunshine days is September (18.4 days).
The month with the least sunshine days is April (10.6 days).

Average UV index in December
White Sulphur Springs, MT

Average UV index in December - White Sulphur Springs, 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 and December (UV index 1).

Average cloud cover in December
White Sulphur Springs, MT

Average cloud cover in December - White Sulphur Springs, MT
  • Average cloud cover in December: 43

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 14).

Average visibility in December
White Sulphur Springs, MT

Average visibility in December - White Sulphur Springs, MT
  • Average visibility in December: 4mi

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

White Sulphur Springs, Montana, USA

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