January weather forecast
Anchorage, AK

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

Weather in January

January in Anchorage, Alaska reveals a somewhat bleak landscape, painted in hues of white and gray. Cold temperatures prevail, with averages oscillating between 13.1°F (-10.5°C) and 20.3°F (-6.5°C), marking January as one of the coldest months of the year. The landscapes are repeatedly dusted by snowfall, adding a whimsical touch to the overall chilly environment. Winds brush past lightly without significant gusts. Despite the bright winter sunshine reflecting off the snow, the city sees just a few hours of daylight, thus emphasizing the reputation of the Alaskan winter.

Temperature

In Anchorage, the lowest average temperatures are observed in January, with a high of 20.3°F (-6.5°C) and a low of 13.1°F (-10.5°C).

Humidity

The months with the highest humidity in Anchorage, Alaska, are January through March, with an average relative humidity of 86%.

Rainfall

In January, in Anchorage, the rain falls for 7.8 days. Throughout January, 0.63" (16mm) of precipitation is accumulated. Throughout the year, in Anchorage, there are 139.9 rainfall days, and 12.6" (320mm) of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall. In Anchorage, in January, snow falls for 9.3 days, with typically accumulated 3.15" (80mm) of snow. Throughout the year, there are 59.3 snowfall days, and 23.5" (597mm) of snow is accumulated.

Ocean temperature

In Anchorage, Alaska, in January, the average water temperature is 37°F (2.8°C).
Note: When swimming, this state is excessively cold, posing a lethal risk. Absent the protection of insulated waterproof wear, hypothermia is likely to occur immediately.

Daylight

The average length of the day in January is 6h and 35min.
On the first day of January, sunrise is at 10:13 am and sunset at 3:52 pm. On the last day of the month, sunrise is at 9:22 am and sunset at 5:03 pm AKST.

Sunshine

In January, the average sunshine in Anchorage, Alaska, is 4h.

UV index

The average daily maximum UV index in January in Anchorage is 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily high UV index of 2 in January translates into this advice:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. The Sun's radiation is especially intense around midday; try to stay in shade during this period. 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. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
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Frequently asked questions

What time of the year is the coldest in Anchorage?

In Anchorage, January registers the lowest temperatures, averaging 20.3°F (-6.5°C) at the peak and 13.1°F (-10.5°C) at the lowest.

How cold is January in Anchorage?

The average high-temperature and low-temperature in Anchorage, Alaska, during January are 20.3°F (-6.5°C) and 13.1°F (-10.5°C) respectively.

What are the most humid months in Anchorage?

January through March, with an average relative humidity of 86%, are most humid months in Anchorage.

What is the average humidity in January in Anchorage?

The average relative humidity in January is 86%.

How many days does it rain in January in Anchorage?

In Anchorage, in January, during 7.8 rainfall days, 0.63" (16mm) of precipitation is typically accumulated.

How many days does it snow in January in Anchorage?

In Anchorage, in January, snow falls for 9.3 days, with typically accumulated 3.15" (80mm) of snow.

What is the ocean temperature in January in Anchorage?

In Anchorage, the average seawater temperature in January is 37°F (2.8°C). 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.

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

The average day length in January in Anchorage is 6h and 35min.

When is the sunrise / sunset in January in Anchorage?

On the first day of January in Anchorage, sunrise is at 10:13 am and sunset at 3:52 pm. On the last day of the month, sunrise is at 9:22 am and sunset at 5:03 pm AKST.

How many hours of sunshine does Anchorage have in January?

The average sunshine duration in January in Anchorage, Alaska, is 4h.

What is the UV index intensity in January in Anchorage?

In Anchorage, Alaska, the average daily maximum UV index in January is 2. 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 January
Anchorage, AK

Average temperature in January - Anchorage, AK
  • Average high temperature in January: 20.3°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 January: 13.1°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 January
Anchorage, AK

Average pressure in January - Anchorage, AK
  • Average pressure in January: 29.7"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 January
Anchorage, AK

Average wind speed in January - Anchorage, AK
  • Average wind speed in January: 5.5mph

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 January
Anchorage, AK

Average humidity in January - Anchorage, AK
  • Average humidity in January: 86%

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 January
Anchorage, AK

Average rainfall in January - Anchorage, AK
  • Average rainfall in January: 0.63"

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 January
Anchorage, AK

Average rainfall days in January - Anchorage, AK
  • Average rainfall days in January: 7.8 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 January
Anchorage, AK

Average snowfall in January - Anchorage, AK
  • Average snowfall in January: 3.15"

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 January
Anchorage, AK

Average snowfall days in January - Anchorage, AK
  • Average snowfall days in January: 9.3 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 January
Anchorage, AK

Average sea temperature in January - Anchorage, AK
  • Average sea temperature in January: 36.9°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 January /
Average sunshine in January
Anchorage, AK

Average daylight in January / Average sunshine in January - Anchorage, AK
  • Average daylight in January: 6h and 4min

The month with the longest days is June (Average daylight: 19h and 12min).
The month with the shortest days is December (Average daylight: 5h and 36min).

  • Average sunshine in January: 4h and 0min

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 January
Anchorage, AK

Average sunshine days in January - Anchorage, AK
  • Average sunshine days in January: 16.9 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 January
Anchorage, AK

Average UV index in January - Anchorage, AK
  • Average UV index in January: 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 January
Anchorage, AK

Average cloud cover in January - Anchorage, AK
  • Average cloud cover in January: 40

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 January
Anchorage, AK

Average visibility in January - Anchorage, AK
  • Average visibility in January: 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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Anchorage, Alaska, USA

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