December weather forecast
Twin Bridges, MT

Share

Weather in December

The first month of the winter, December, is also a subzero cold month in Twin Bridges, Montana, with an average temperature varying between 26.4°F (-3.1°C) and 11.3°F (-11.5°C).

Temperature

December, with average temperatures reaching a high of 26.4°F (-3.1°C) and a low of 11.3°F (-11.5°C), is the coldest month.

Humidity

In December, the average relative humidity is 84%.

Rainfall

In Twin Bridges, during December, the rain falls for 11.9 days and regularly aggregates up to 0.71" (18mm) of precipitation. In Twin Bridges, during the entire year, the rain falls for 158 days and collects up to 12.2" (310mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall. In December, it is snowing for 4.5 days. Throughout December, 0.87" (22mm) of snow is accumulated. Throughout the year, there are 20.8 snowfall days, and 5.12" (130mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 8h and 48min of daylight.
On the first day of the month, sunrise is at 7:49 am and sunset at 4:47 pm. On the last day of December, sunrise is at 8:09 am and sunset at 4:55 pm MST.

Sunshine

The month with the least sunshine is December, with an average of 6h of sunshine.

UV index

The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index, 2 during December, leads to the following recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Updated: Aug 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month?

Twin Bridges witnesses the coldest weather in December, with temperatures averaging a high of 26.4°F (-3.1°C) and a low of 11.3°F (-11.5°C).

How cold is December?

During December, Twin Bridges experiences an average high-temperature of 26.4°F (-3.1°C) and a low-temperature of 11.3°F (-11.5°C).

What is the average humidity in December?

The average relative humidity in December is 84%.

How much does it rain in Twin Bridges in December?

In Twin Bridges, during December, the rain falls for 11.9 days and regularly aggregates up to 0.71" (18mm) of precipitation.

How much does it snow in December?

In Twin Bridges, in December, during 4.5 snowfall days, 0.87" (22mm) 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 48min of daylight.

What is the average length of the day in December in Twin Bridges?

In Twin Bridges, the average day length in December is 8h and 46min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:49 am and sunset at 4:47 pm. On the last day of the month, in Twin Bridges, sunrise is at 8:09 am and sunset at 4:55 pm MST.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 6h of sunshine.

How many hours of sunshine does Twin Bridges have in December?

In December, the average sunshine duration is 6h.

When is the lowest UV index?

January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index reading in December?

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health 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
Twin Bridges, MT

Average temperature in December - Twin Bridges, MT
  • Average high temperature in December: 26.4°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 (26.4°F).

  • Average low temperature in December: 11.3°F

The month with the highest average low temperature is July (47.7°F).
The coldest month (with the lowest average low temperature) is December (11.3°F).

Average pressure in December
Twin Bridges, MT

Average pressure in December - Twin Bridges, MT
  • Average pressure in December: 30.22"Hg

The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in December
Twin Bridges, MT

Average wind speed in December - Twin Bridges, MT
  • Average wind speed in December: 6.1mph

The windiest month (with the highest average wind speed) is November (6.3mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).

Average humidity in December
Twin Bridges, MT

Average humidity in December - Twin Bridges, MT
  • Average humidity in December: 84%

The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are July and August (46%).

Average rainfall in December
Twin Bridges, MT

Average rainfall in December - Twin Bridges, MT
  • Average rainfall in December: 0.71"

The wettest month (with the highest rainfall) is May (1.85").
The driest month (with the least rainfall) is January (0.59").

Average rainfall days in December
Twin Bridges, MT

Average rainfall days in December - Twin Bridges, MT
  • Average rainfall days in December: 11.9 days

The month with the highest number of rainy days is April (18.6 days).
The month with the least rainy days is August (8.6 days).

Average snowfall in December
Twin Bridges, MT

Average snowfall in December - Twin Bridges, MT
  • Average snowfall in December: 0.87"

The month with the highest snowfall is February (1.81").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Twin Bridges, MT

Average snowfall days in December - Twin Bridges, MT
  • Average snowfall days in December: 4.5 days

The month with the highest number of snowfall days is February (6.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Twin Bridges, MT

Average daylight in December / Average sunshine in December - Twin Bridges, MT
  • Average daylight in December: 8h and 5min

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

  • Average sunshine in December: 6h and 0min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

Average sunshine days in December
Twin Bridges, MT

Average sunshine days in December - Twin Bridges, MT
  • Average sunshine days in December: 14.8 days

The month with the most sunshine days is July (17.8 days).
The month with the least sunshine days is April (7.8 days).

Average UV index in December
Twin Bridges, MT

Average UV index in December - Twin Bridges, MT
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

Average cloud cover in December
Twin Bridges, MT

Average cloud cover in December - Twin Bridges, MT
  • Average cloud cover in December: 40

The month with the most cloud cover is February (Cloud cover 42).
The months with the least cloud cover are July and August (Cloud cover 14).

Average visibility in December
Twin Bridges, MT

Average visibility in December - Twin Bridges, 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 months with the lowest visibility are January, February and December (5mi).

Twin Bridges, Montana, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location