December weather forecast
Twin Forks, ID

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Weather in December

The first month of the winter, December, is still a freezing cold month in Twin Forks, Idaho, with an average temperature varying between 23.9°F (-4.5°C) and 9.5°F (-12.5°C).

Temperature

December, with its average high-temperature of 23.9°F (-4.5°C) and an average low-temperature of 9.5°F (-12.5°C), holds the record as the coldest month.

Humidity

In Twin Forks, the average relative humidity in December is 90%.

Rainfall

In Twin Forks, during December, the rain falls for 5.9 days and regularly aggregates up to 2.4" (61mm) of precipitation. Throughout the year, there are 110.1 rainfall days, and 23.35" (593mm) of precipitation is accumulated.

Snowfall

January through June, September through December are months with snowfall. In Twin Forks, during December, snow falls for 21.8 days and regularly aggregates up to 19.41" (493mm) of snow. Throughout the year, there are 125.3 snowfall days, and 120.47" (3060mm) of snow is accumulated.

Daylight

With an average of 9h and 0min of daylight, December has the shortest days of the year.
On the first day of December in Twin Forks, sunrise is at 7:39 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:58 am and sunset at 4:57 pm MST.

Sunshine

In Twin Forks, the average sunshine in December is 4.2h.

UV index

The months with the lowest UV index are January through March and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.
Note: An average maximum UV index of 1 in December leads to these recommendations:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Updated: Jul 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the coldest months?

Twin Forks records the coldest temperatures in December, averaging a high of 23.9°F (-4.5°C) and a low of 9.5°F (-12.5°C).

How cold is December in Twin Forks?

Twin Forks in December has an average high-temperature of 23.9°F (-4.5°C) and an average low-temperature of 9.5°F (-12.5°C).

What is the average humidity in December?

The average relative humidity in December is 90%.

How much does it rain in December?

In Twin Forks, in December, during 5.9 rainfall days, 2.4" (61mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Twin Forks, in December, during 21.8 snowfall days, 19.41" (493mm) 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 9h and 0min of daylight.

How many hours of daylight does Twin Forks have in December?

The average day length in December is 8h and 59min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:39 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:58 am and sunset at 4:57 pm MST.

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

The average sunshine duration in December is 4.2h.

When is the lowest UV index?

The months with the lowest UV index in Twin Forks are January through March and December, with an average maximum UV index of 1.

How high is the UV index in December?

In December, the average daily maximum UV index is 1. A UV Index reading of 2, and below, represents a low health threat from exposure to the Sun's UV radiation.
Average max. wind speed
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 Forks, ID

Average temperature in December - Twin Forks, ID
  • Average high temperature in December: 23.9°F

The warmest month (with the highest average high temperature) is July (77.2°F).
The month with the lowest average high temperature is December (23.9°F).

  • Average low temperature in December: 9.5°F

The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is January (9.1°F).

Average pressure in December
Twin Forks, ID

Average pressure in December - Twin Forks, ID
  • Average pressure in December: 30.25"Hg

The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in December
Twin Forks, ID

Average wind speed in December - Twin Forks, ID
  • Average wind speed in December: 4.6mph

The windiest month (with the highest average wind speed) is June (6.3mph).
The calmest months (with the lowest average wind speed) are January and December (4.6mph).

Average humidity in December
Twin Forks, ID

Average humidity in December - Twin Forks, ID
  • Average humidity in December: 90%

The month with the highest relative humidity is February (93%).
The month with the lowest relative humidity is August (45%).

Average rainfall in December
Twin Forks, ID

Average rainfall in December - Twin Forks, ID
  • Average rainfall in December: 2.4"

The wettest month (with the highest rainfall) is February (2.91").
The driest month (with the least rainfall) is July (0.71").

Average rainfall days in December
Twin Forks, ID

Average rainfall days in December - Twin Forks, ID
  • Average rainfall days in December: 5.9 days

The month with the highest number of rainy days is May (16.1 days).
The month with the least rainy days is January (4.5 days).

Average snowfall in December
Twin Forks, ID

Average snowfall in December - Twin Forks, ID
  • Average snowfall in December: 19.41"

The month with the highest snowfall is January (24.06").
The months with the least snowfall are July and August (0").

Average snowfall days in December
Twin Forks, ID

Average snowfall days in December - Twin Forks, ID
  • Average snowfall days in December: 21.8 days

The month with the highest number of snowfall days is December (21.8 days).
The months with the least snowfall days are July and August (0 days).

Average daylight in December /
Average sunshine in December
Twin Forks, ID

Average daylight in December / Average sunshine in December - Twin Forks, ID
  • Average daylight in December: 9h and 0min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

Average sunshine days in December
Twin Forks, ID

Average sunshine days in December - Twin Forks, ID
  • Average sunshine days in December: 9 days

The month with the most sunshine days is July (20.6 days).
The month with the least sunshine days is February (7.3 days).

Average UV index in December
Twin Forks, ID

Average UV index in December - Twin Forks, ID
  • 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, March and December (UV index 1).

Average cloud cover in December
Twin Forks, ID

Average cloud cover in December - Twin Forks, ID
  • Average cloud cover in December: 60

The month with the most cloud cover is February (Cloud cover 65).
The months with the least cloud cover are July and August (Cloud cover 13).

Average visibility in December
Twin Forks, ID

Average visibility in December - Twin Forks, ID
  • Average visibility in December: 4mi

The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (3mi).

Twin Forks, Idaho, USA

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