December weather forecast
Salmon, ID

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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 heralds the true arrival of winter with cold temperatures, increased snowfall and reduced daylight hours. The landscapes of Salmon transform into a winter paradise, making it an ideal destination for winter sports. Known for exhibiting a significant drop in mercury levels, typical temperatures in December range from 9.5°F (-12.5°C) to 25.2°F (-3.8°C). This shift in weather parameters also manifests in the diminishing daylight hours and an escalation of snowfall days. Steeped in the spirit of the holiday season, this month offers a vibrant end to the weather journey in Salmon across the year.

Temperature

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

Humidity

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

Rainfall

In December, in Salmon, the rain falls for 6.8 days. Throughout December, 0.55" (14mm) of precipitation is accumulated. Throughout the year, in Salmon, Idaho, there are 129.5 rainfall days, and 12.4" (315mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, September through December. In Salmon, in December, snow falls for 10.4 days, with typically accumulated 2.8" (71mm) of snow. Throughout the year, in Salmon, there are 63.5 snowfall days, and 22.76" (578mm) of snow is accumulated.

Daylight

The month with the shortest days in Salmon is December, with an average of 8h and 48min of daylight.
On the first day of the month, sunrise is at 7:54 am and sunset at 4:54 pm. On the last day of December, in Salmon, sunrise is at 8:14 am and sunset at 5:03 pm MST.

Sunshine

In December, the average sunshine is 5.2h.

UV index

The months with the lowest UV index are January, February 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 unprotected exposure to Sun's UV rays for average individuals.
Note: In December, a daily UV index of 1 turns into the following recommendations:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
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Frequently asked questions

What time of the year is the coldest in Salmon?

The month of December sees the average lowest temperatures in Salmon, reaching 25.2°F (-3.8°C) at the peak and 9.5°F (-12.5°C) at the low.

How cold is December in Salmon?

The high-temperature, in December, in Salmon, is 25.2°F (-3.8°C), while the low-temperature averages to 9.5°F (-12.5°C).

What is the average humidity in December in Salmon?

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

How many days does it rain in December in Salmon?

In December, in Salmon, the rain falls for 6.8 days. Throughout December, 0.55" (14mm) of precipitation is accumulated.

How much does it snow in Salmon in December?

In December, it is snowing for 10.4 days. Throughout December, 2.8" (71mm) of snow is accumulated.

What is the month with the shortest days in Salmon?

December has the shortest days of the year in Salmon, Idaho, with an average of 8h and 48min of daylight.

How many hours of daylight does Salmon have in December?

In Salmon, the average day length in December is 8h and 49min.

What time are sunrise and sunset in December in Salmon?

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

How many hours of sunshine does Salmon have in December?

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

What are the months with the lowest UV index in Salmon?

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

What is the UV index intensity in December in Salmon?

In Salmon, the average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a low health threat 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 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: 5h 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 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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Salmon, Idaho, USA

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