December weather forecast
Three Forks, MT

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Weather in December

December, the first month of the winter in Three Forks, is also a subzero cold month, with an average temperature varying between 12.7°F (-10.7°C) and 28°F (-2.2°C).

Temperature

Three Forks reaches its lowest average temperatures in December, measuring 28°F (-2.2°C) at the peak and 12.7°F (-10.7°C) at the lowest.

Humidity

The average relative humidity in December is 84%.

Rainfall

In Three Forks, in December, during 9.5 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. In Three Forks, during the entire year, the rain falls for 134.2 days and collects up to 11.34" (288mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall. In Three Forks, during December, snow falls for 14.8 days and regularly aggregates up to 4.72" (120mm) of snow. Throughout the year, there are 79.6 snowfall days, and 30.08" (764mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 8h and 42min of daylight.
On the first day of the month, sunrise is at 7:48 am and sunset at 4:42 pm. On the last day of December, sunrise is at 8:07 am and sunset at 4:51 pm MST.

Sunshine

In Three Forks, the average sunshine in December is 6.1h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In December, a regular UV index of 1 translates into these guidelines:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Updated: Jun 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month?

December, recording an average high temperature of 28°F (-2.2°C) and a low temperature of 12.7°F (-10.7°C), is Three Forks's coldest month.

How cold is it in December?

An average high-temperature, in December, in Three Forks, is 28°F (-2.2°C) and the average low-temperature is 12.7°F (-10.7°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in August is calculated to be 82.4°F (28°C).

What is the average humidity in December?

The average relative humidity in December is 84%.

How much does it rain in Three Forks in December?

In Three Forks, during December, the rain falls for 9.5 days and regularly aggregates up to 0.67" (17mm) of precipitation.

How many days does it snow in December?

In December, it is snowing for 14.8 days. Throughout December, 4.72" (120mm) of snow is accumulated.

What is the month with the shortest days?

The month with the shortest days in Three Forks is December, with an average of 8h and 42min of daylight.

What is the average length of the day in December in Three Forks?

The average day length in December is 8h and 44min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:48 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 8:07 am and sunset at 4:51 pm MST.

How long on average sun shines in December in Three Forks?

In Three Forks, the average sunshine duration in December is 6.1h.

What is the month with the lowest UV index?

December is the month with the lowest UV index, with an average maximum UV index of 1.

What is the UV index reading in December in Three Forks?

The average daily maximum UV index in December is 1. A UV Index reading of 2, and below, represents a low health risk from unsafe 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
Three Forks, MT

Average temperature in December - Three Forks, MT
  • Average high temperature in December: 28°F

The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is December (28°F).

  • Average low temperature in December: 12.7°F

The month with the highest average low temperature is August (50.5°F).
The coldest month (with the lowest average low temperature) is December (12.7°F).

Average pressure in December
Three Forks, MT

Average pressure in December - Three Forks, MT
  • Average pressure in December: 30.19"Hg

The months with the highest atmospheric pressure are January and December (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in December
Three Forks, MT

Average wind speed in December - Three Forks, MT
  • Average wind speed in December: 4.8mph

The windiest month (with the highest average wind speed) is April (5.5mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).

Average humidity in December
Three Forks, MT

Average humidity in December - Three Forks, MT
  • Average humidity in December: 84%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (44%).

Average rainfall in December
Three Forks, MT

Average rainfall in December - Three Forks, MT
  • Average rainfall in December: 0.67"

The wettest month (with the highest rainfall) is June (1.57").
The driest month (with the least rainfall) is August (0.51").

Average rainfall days in December
Three Forks, MT

Average rainfall days in December - Three Forks, MT
  • Average rainfall days in December: 9.5 days

The month with the highest number of rainy days is April (16.5 days).
The month with the least rainy days is August (7.6 days).

Average snowfall in December
Three Forks, MT

Average snowfall in December - Three Forks, MT
  • Average snowfall in December: 4.72"

The month with the highest snowfall is February (6.02").
The months with the least snowfall are July and August (0").

Average snowfall days in December
Three Forks, MT

Average snowfall days in December - Three Forks, MT
  • Average snowfall days in December: 14.8 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
Three Forks, MT

Average daylight in December / Average sunshine in December - Three Forks, MT
  • Average daylight in December: 8h and 4min

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

  • Average sunshine in December: 6h and 1min

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 54min).

Average sunshine days in December
Three Forks, MT

Average sunshine days in December - Three Forks, MT
  • Average sunshine days in December: 14.4 days

The month with the most sunshine days is September (18.7 days).
The month with the least sunshine days is April (9.3 days).

Average UV index in December
Three Forks, MT

Average UV index in December - Three Forks, MT
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Three Forks, MT

Average cloud cover in December - Three Forks, MT
  • Average cloud cover in December: 38

The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 13).

Average visibility in December
Three Forks, MT

Average visibility in December - Three Forks, MT
  • Average visibility in December: 5mi

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

Three Forks, Montana, USA

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