December weather forecast
Anchorage, AK

Wintertime in Anchorage, Alaska with mountains blanketed in snow
Wintertime in Anchorage, Alaska with mountains blanketed in snow

Weather in December

December, the first month of the winter in Anchorage, is still a freezing cold month, with an average temperature ranging between min 16.7°F (-8.5°C) and max 23.4°F (-4.8°C).

Temperature

In December, the average high-temperature is almost the same as in November - a still freezing cold 23.4°F (-4.8°C). In December, the average low-temperature is 16.7°F (-8.5°C).

Humidity

In Anchorage, the average relative humidity in December is 84%.

Rainfall

In Anchorage, during December, the rain falls for 8.6 days and regularly aggregates up to 1.18" (30mm) of precipitation. Throughout the year, there are 139.9 rainfall days, and 12.6" (320mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Anchorage, Alaska, are January through May, September through December. December is the month with the most snowfall in Anchorage, Alaska. Snow falls for 11.6 days and accumulates 5.51" (140mm) of snow.

Ocean temperature

In Anchorage, the average seawater temperature in December is 39.6°F (4.2°C).
Note: For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

Daylight

The month with the shortest days in Anchorage is December, with an average of 5h and 38min of daylight.
On the first day of the month, sunrise is at 9:45 am and sunset at 3:51 pm. On the last day of December, in Anchorage, sunrise is at 10:13 am and sunset at 3:51 pm AKST.

Sunshine

The month with the least sunshine is December, with an average of 3.8h of sunshine.

UV index

In Anchorage, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in December in Anchorage?

In December, the average relative humidity in Anchorage is 84%.

How many days does it rain in December in Anchorage?

In Anchorage, Alaska, during December, the rain falls for 8.6 days and regularly aggregates up to 1.18" (30mm) of precipitation.

What is the snowiest month in Anchorage?

The month with the most snowfall in Anchorage, Alaska, is December, when snow falls for 11.6 days and typically aggregates up to 5.51" (140mm) of snow.

How many days does it snow in December in Anchorage?

In Anchorage, Alaska, in December, during 11.6 snowfall days, 5.51" (140mm) of snow is typically accumulated.

What is the water temperature in December in Anchorage?

In Anchorage, Alaska, the average seawater temperature in December is 39.6°F (4.2°C). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

What is the month with the shortest days in Anchorage?

With an average of 5h and 38min of daylight, December has the shortest days of the year in Anchorage.

How many hours of daylight does Anchorage have in December?

In Anchorage, the average day length in December is 5h and 38min.

What time are sunrise and sunset in December in Anchorage?

On the first day of December, sunrise is at 9:45 am and sunset at 3:51 pm. On the last day of the month, sunrise is at 10:13 am and sunset at 3:51 pm AKST.

What is the month with the least sunshine in Anchorage?

With an average of 3.8h of sunshine, December has the least sunshine of the year in Anchorage.

How long on average sun shines in December in Anchorage?

In Anchorage, Alaska, the average sunshine duration in December is 3.8h.

What is the UV index reading in December in Anchorage?

The average daily maximum UV index in December in Anchorage, Alaska, is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from exposure to the Sun's 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
Anchorage, AK

Average temperature in December - Anchorage, AK
  • Average high temperature in December: 23.4°F

The warmest month (with the highest average high temperature) is July (61.9°F).
The month with the lowest average high temperature is January (20.3°F).

  • Average low temperature in December: 16.7°F

The month with the highest average low temperature is July (51.3°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).

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Average pressure in December
Anchorage, AK

Average pressure in December - Anchorage, AK
  • Average pressure in December: 29.67"Hg

The month with the highest atmospheric pressure is July (29.96"Hg).
The months with the lowest atmospheric pressure are November and December (29.67"Hg).

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Average wind speed in December
Anchorage, AK

Average wind speed in December - Anchorage, AK
  • Average wind speed in December: 6.2mph

The windiest month (with the highest average wind speed) is November (6.3mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).

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Average humidity in December
Anchorage, AK

Average humidity in December - Anchorage, AK
  • Average humidity in December: 84%

The months with the highest relative humidity are January, February and March (86%).
The month with the lowest relative humidity is May (68%).

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Average rainfall in December
Anchorage, AK

Average rainfall in December - Anchorage, AK
  • Average rainfall in December: 1.18"

The wettest month (with the highest rainfall) is September (1.93").
The driest month (with the least rainfall) is May (0.55").

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Average rainfall days in December
Anchorage, AK

Average rainfall days in December - Anchorage, AK
  • Average rainfall days in December: 8.6 days

The month with the highest number of rainy days is August (17.9 days).
The month with the least rainy days is February (7 days).

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Average snowfall in December
Anchorage, AK

Average snowfall in December - Anchorage, AK
  • Average snowfall in December: 5.51"

The month with the highest snowfall is December (5.51").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in December
Anchorage, AK

Average snowfall days in December - Anchorage, AK
  • Average snowfall days in December: 11.6 days

The month with the highest number of snowfall days is December (11.6 days).
The months with the least snowfall days are June, July and August (0 days).

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Average sea temperature in December
Anchorage, AK

Average sea temperature in December - Anchorage, AK
  • Average sea temperature in December: 39.6°F

The best month for swimming (with the highest average sea temperature) is August (53.1°F).
The coldest month (with the lowest average sea temperature) is February (35.8°F).

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Average daylight in December /
Average sunshine in December
Anchorage, AK

Average daylight in December / Average sunshine in December - Anchorage, AK
  • Average daylight in December: 5h and 38min

The month with the longest days is June (Average daylight: 19h and 13min).
The month with the shortest days is December (Average daylight: 5h and 38min).

  • Average sunshine in December: 3h and 48min

The months with the most sunshine are May and June (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 3h and 48min).

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Average sunshine days in December
Anchorage, AK

Average sunshine days in December - Anchorage, AK
  • Average sunshine days in December: 15.5 days

The month with the most sunshine days is January (16.9 days).
The month with the least sunshine days is September (11.1 days).

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Average UV index in December
Anchorage, AK

Average UV index in December - Anchorage, AK
  • Average UV index in December: 2

The months with the highest UV index are June and July (UV index 4).
The month with the lowest UV index is February (UV index 1).

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Average cloud cover in December
Anchorage, AK

Average cloud cover in December - Anchorage, AK
  • Average cloud cover in December: 47

The month with the most cloud cover is December (Cloud cover 47).
The month with the least cloud cover is May (Cloud cover 38).

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Average visibility in December
Anchorage, AK

Average visibility in December - Anchorage, AK
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is March (5mi).

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