Anchorage
Alaska, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Anchorage, AK

Wintertime in Anchorage, Alaska, with mountains blanketed in snow
Wintertime in Anchorage, Alaska, with mountains blanketed in snow
December, the first month of the winter, in Anchorage, is still a freezing cold month, with average temperature varying between 32°F (0°C) and 23.4°F (-4.8°C).

Temperature

In December, the average high-temperature is relatively the same as in November - a still subzero cold 23.4°F (-4.8°C). The average low-temperature, in December, is 32°F (0°C).

Humidity

In December, the average relative humidity is 84%.

Rainfall

In Anchorage, it is raining for 8.6 days, with typically 1.18" (30mm) of accumulated precipitation. Throughout the year, in Anchorage, there are 139.9 rainfall days, and 12.6" (320mm) of precipitation is accumulated.

Snowfall

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

Ocean temperature

In Anchorage, the average water temperature is 39.6°F (4.2°C).
Note: For swimming, this is considered very dangerous and immediately life-threatening. Total loss of breathing control instantly occurs, and clear thinking becomes almost impossible. A specialized swimsuit is obligatory to minimize thermal loss.

Daylight

With an average of 5.6h of daylight, December has the shortest days of the year.

Sunshine

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

UV index

In Anchorage, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to the UV radiation for average individuals.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in December in Anchorage?

In December, in Anchorage, Alaska, the average high-temperature is 23.4°F (-4.8°C), and the average low-temperature is 32°F (0°C).

What is the average humidity in December in Anchorage?

The average relative humidity in December in Anchorage is 84%.

How many days does it rain in December in Anchorage?

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

How much does it snow in Anchorage in December?

In Anchorage, during December, snow falls for 11.6 days and regularly aggregates up to 5.51" (140mm) of snow.

When does it snow the most in Anchorage?

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

What is the water temperature in December in Anchorage?

In Anchorage, in December, the average water temperature 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?

The month with the shortest days in Anchorage is December, with an average of 5.6h of daylight.

What is the average length of the day in December in Anchorage?

The average length of the day in December is 5.6h.

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, Alaska.

How long on average sun shines in December in Anchorage?

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

How high is the UV index in December in Anchorage?

The average daily maximum UV index in December in Anchorage, Alaska, is 2. A UV Index reading of 2, and below, represents a low health risk from the exposure to the Sun's UV radiation.
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: 0°F

Months with the highest average low temperature are January, February, March, April, May, June, July, August, September, October, November and December (0°F).
Coldest months (with the lowest average low temperature) are January, February, March, April, May, June, July, August, September, October, November and December (0°F).

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

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

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 lowest rainfall) is May (0.55").

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 lowest number of rainy days is February (7 days).

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

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

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).
Months with the lowest number of snowfall days are June, July and August (0 days).

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).

Average daylight in December / Average sunshine in December - Anchorage, AK
  • Average daylight in December: 5.6h

The month with the longest days is June (Average daylight: 19.2h).
The month with shortest days is December (Average daylight: 5.6h).

  • Average sunshine in December: 3.8h

Months with most sunshine are May and June (Average sunshine: 11.7h).
The month with least sunshine is December (Average sunshine: 3.8h).

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

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).