December weather forecast
Salmon, ID

Bright yellow trees along the shores of the iconic Salmon River in Salmon, Idaho
Bright yellow trees along the shores of the iconic Salmon River in Salmon, Idaho

Weather in December

December, the first month of the winter in Salmon, is also a subzero cold month, with an average temperature varying between 9.5°F (-12.5°C) and 25.2°F (-3.8°C).

Temperature

December is the coldest month, with an average high-temperature of 25.2°F (-3.8°C) and an average low-temperature of 9.5°F (-12.5°C).

Humidity

In Salmon, the average relative humidity in December is 86%.

Rainfall

In December, the rain falls for 6.8 days. Throughout December, 0.55" (14mm) of precipitation is accumulated. In Salmon, during the entire year, the rain falls for 129.5 days and collects up to 12.4" (315mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall in Salmon, Idaho. In Salmon, during December, snow falls for 10.4 days and regularly aggregates up to 2.8" (71mm) of snow. Throughout the year, there are 63.5 snowfall days, and 22.76" (578mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 8h and 49min of daylight.
On the first day of December in Salmon, sunrise is at 7:54 am and sunset at 4:55 pm. On the last day of the month, sunrise is at 8:14 am and sunset at 5:03 pm MST.

Sunshine

The average sunshine in December is 5.2h.

UV index

The months with the lowest UV index in Salmon, Idaho, are January, February and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for average individuals.
Note: In December, the average maximum UV index of 1 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Salmon?

The coldest month is December, with an average high-temperature of 25.2°F (-3.8°C) and an average low-temperature of 9.5°F (-12.5°C).

What is the temperature in December in Salmon?

In December, in Salmon, Idaho, the average high-temperature is 25.2°F (-3.8°C), and the average low-temperature is 9.5°F (-12.5°C).

What is the average humidity in December in Salmon?

The average relative humidity in December in Salmon, Idaho, is 86%.

How much does it rain in Salmon in December?

In Salmon, Idaho, during December, the rain falls for 6.8 days and regularly aggregates up to 0.55" (14mm) of precipitation.

How much does it snow in Salmon in December?

In Salmon, in December, snow falls for 10.4 days, with typically accumulated 2.8" (71mm) of snow.

What is the month with the shortest days in Salmon?

With an average of 8h and 49min of daylight, December has the shortest days of the year in Salmon, Idaho.

How many hours of daylight does Salmon have in December?

The average day length in December in Salmon is 8h and 49min.

When is the sunrise / sunset in December in Salmon?

In December, on the first day of the month, sunrise is at 7:54 am and sunset at 4:55 pm. On the last day of the month, in Salmon, sunrise is at 8:14 am and sunset at 5:03 pm MST.

How long on average sun shines in December in Salmon?

The average sunshine duration in December in Salmon, Idaho, is 5.2h.

What is the month with the lowest UV index in Salmon?

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

What is the UV index reading in December in Salmon?

In December, the average daily maximum UV index is 1. A UV Index reading of 2, and below, represents 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
Salmon, ID

Average temperature in December - Salmon, ID
  • Average high temperature in December: 25.2°F

The warmest month (with the highest average high temperature) is July (75.7°F).
The month with the lowest average high temperature is December (25.2°F).

  • Average low temperature in December: 9.5°F

The month with the highest average low temperature is August (47.5°F).
The coldest months (with the lowest average low temperature) are January and December (9.5°F).

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Average pressure in December
Salmon, ID

Average pressure in December - Salmon, ID
  • Average pressure in December: 30.23"Hg

The month with the highest atmospheric pressure is January (30.25"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in December
Salmon, ID

Average wind speed in December - Salmon, ID
  • Average wind speed in December: 4.9mph

The windiest months (with the highest average wind speed) are March and April (5.2mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

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Average humidity in December
Salmon, ID

Average humidity in December - Salmon, ID
  • Average humidity in December: 86%

The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is August (43%).

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Average rainfall in December
Salmon, ID

Average rainfall in December - Salmon, ID
  • Average rainfall in December: 0.55"

The wettest month (with the highest rainfall) is June (2.05").
The driest months (with the least rainfall) are July and August (0.51").

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Average rainfall days in December
Salmon, ID

Average rainfall days in December - Salmon, ID
  • Average rainfall days in December: 6.8 days

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (6.3 days).

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Average snowfall in December
Salmon, ID

Average snowfall in December - Salmon, ID
  • Average snowfall in December: 2.8"

The month with the highest snowfall is February (5").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in December
Salmon, ID

Average snowfall days in December - Salmon, ID
  • Average snowfall days in December: 10.4 days

The month with the highest number of snowfall days is February (12.3 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in December /
Average sunshine in December
Salmon, ID

Average daylight in December / Average sunshine in December - Salmon, ID
  • Average daylight in December: 8h and 49min

The month with the longest days is June (Average daylight: 15h and 35min).
The month with the shortest days is December (Average daylight: 8h and 49min).

  • Average sunshine in December: 5h and 12min

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 6min).

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Average sunshine days in December
Salmon, ID

Average sunshine days in December - Salmon, ID
  • Average sunshine days in December: 18.5 days

The month with the most sunshine days is July (19.4 days).
The month with the least sunshine days is April (7.7 days).

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Average UV index in December
Salmon, ID

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

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Average cloud cover in December
Salmon, ID

Average cloud cover in December - Salmon, ID
  • Average cloud cover in December: 49

The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 13).

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Average visibility in December
Salmon, ID

Average visibility in December - Salmon, 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, February, March and December (4mi).

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