December weather forecast
Riggins, ID

The scenic Snake River between large mountains, with pitched tents and visible footpaths in the mountains near Riggins, Idaho
The scenic Snake River between large mountains, with pitched tents and visible footpaths in the mountains near Riggins, Idaho

Weather in December

December, the first month of the winter in Riggins, is still a freezing cold month, with an average temperature fluctuating between 12.7°F (-10.7°C) and 25.3°F (-3.7°C).

Temperature

December is the coldest month, with an average high-temperature of 25.3°F (-3.7°C) and an average low-temperature of 12.7°F (-10.7°C).

Humidity

The average relative humidity in December in Riggins is 91%.

Rainfall

In Riggins, in December, during 3.5 rainfall days, 3.82" (97mm) of precipitation is typically accumulated. In Riggins, during the entire year, the rain falls for 81 days and collects up to 32.68" (830mm) of precipitation.

Snowfall

Months with snowfall are January through December. In Riggins, in December, snow falls for 22.1 days, with typically accumulated 32.13" (816mm) of snow. In Riggins, during the entire year, snow falls for 160 days and aggregates up to 210.63" (5350mm) of snow.

Daylight

With an average of 8h and 47min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:04 am and sunset at 4:03 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:11 pm PST.

Sunshine

In Riggins, the average sunshine in December is 3.4h.

UV index

The months with the lowest UV index in Riggins are January through April, November and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily maximum UV index of 1 in December interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 Riggins?

The coldest month in Riggins is December, with an average high-temperature of 25.3°F (-3.7°C) and an average low-temperature of 12.7°F (-10.7°C).

What is the average humidity in December in Riggins?

In December, the average relative humidity in Riggins, Idaho, is 91%.

How much does it rain in Riggins in December?

In December, the rain falls for 3.5 days. Throughout December, 3.82" (97mm) of precipitation is accumulated.

How much does it snow in Riggins in December?

In Riggins, in December, snow falls for 22.1 days, with typically accumulated 32.13" (816mm) of snow.

What is the month with the shortest days in Riggins?

December has the shortest days of the year, with an average of 8h and 47min of daylight.

How many hours of daylight does Riggins have in December?

The average day length in December in Riggins is 8h and 47min.

What time are sunrise and sunset in December in Riggins?

In December, on the first day of the month, sunrise is at 7:04 am and sunset at 4:03 pm. On the last day of the month, in Riggins, Idaho, sunrise is at 7:24 am and sunset at 4:11 pm PST.

How many hours of sunshine does Riggins have in December?

The average sunshine duration in December in Riggins is 3.4h.

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

January through April, November and December, with an average maximum UV index of 1, are months with the lowest UV index.

What is the UV index reading in December in Riggins?

In Riggins, Idaho, the average daily maximum UV index in December is 1. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to UV radiation.
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
Riggins, ID

Average temperature in December - Riggins, ID
  • Average high temperature in December: 25.3°F

The warmest months (with the highest average high temperature) are July and August (75.7°F).
The month with the lowest average high temperature is December (25.3°F).

  • Average low temperature in December: 12.7°F

The month with the highest average low temperature is August (45.7°F).
The coldest month (with the lowest average low temperature) is January (12°F).

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Average pressure in December
Riggins, ID

Average pressure in December - Riggins, ID
  • Average pressure in December: 30.21"Hg

The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in December
Riggins, ID

Average wind speed in December - Riggins, ID
  • Average wind speed in December: 5.9mph

The windiest month (with the highest average wind speed) is March (6mph).
The calmest months (with the lowest average wind speed) are May, June, August and September (5.3mph).

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Average humidity in December
Riggins, ID

Average humidity in December - Riggins, ID
  • Average humidity in December: 91%

The month with the highest relative humidity is February (94%).
The month with the lowest relative humidity is August (48%).

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Average rainfall in December
Riggins, ID

Average rainfall in December - Riggins, ID
  • Average rainfall in December: 3.82"

The wettest month (with the highest rainfall) is February (4.49").
The driest month (with the least rainfall) is July (0.51").

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Average rainfall days in December
Riggins, ID

Average rainfall days in December - Riggins, ID
  • Average rainfall days in December: 3.5 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (1.8 days).

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Average snowfall in December
Riggins, ID

Average snowfall in December - Riggins, ID
  • Average snowfall in December: 32.13"

The month with the highest snowfall is February (36.1").
The month with the least snowfall is August (0.08").

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Average snowfall days in December
Riggins, ID

Average snowfall days in December - Riggins, ID
  • Average snowfall days in December: 22.1 days

The month with the highest number of snowfall days is March (24.9 days).
The month with the least snowfall days is August (0.3 days).

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

Average daylight in December / Average sunshine in December - Riggins, ID
  • Average daylight in December: 8h and 47min

The month with the longest days is June (Average daylight: 15h and 37min).
The month with the shortest days is December (Average daylight: 8h and 47min).

  • Average sunshine in December: 3h and 24min

The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).

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Average sunshine days in December
Riggins, ID

Average sunshine days in December - Riggins, ID
  • Average sunshine days in December: 9 days

The month with the most sunshine days is July (22.3 days).
The months with the least sunshine days are February and March (6.3 days).

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Average UV index in December
Riggins, ID

Average UV index in December - Riggins, 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, April, November and December (UV index 1).

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Average cloud cover in December
Riggins, ID

Average cloud cover in December - Riggins, ID
  • Average cloud cover in December: 67

The month with the most cloud cover is February (Cloud cover 73).
The month with the least cloud cover is August (Cloud cover 13).

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Average visibility in December
Riggins, ID

Average visibility in December - Riggins, ID
  • Average visibility in December: 4mi

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

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