December weather forecast
Seward, AK

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The busy Small Boat Harbor in Seward City, Alaska
The busy Small Boat Harbor in Seward City, Alaska

Weather in December

December marks the official start of winter in Seward, Alaska. With the temperature hovering around a high of 27°F (-2.8°C), it ushers in the coldest phase of the year. The resurge in snowfall with a considerable 15.91" (404mm) is a clear indication of changing climatic conditions. The shorter daylight hours and longer nights become a stark reminder of the harsh Alaskan winter at its onset. Nevertheless, Seward in December adorned in a snow blanket presents a magnificent spectacle, embracing the serene silence of winter with grace.

Temperature

The start of December marks an average high-temperature of a still freezing cold 27°F (-2.8°C), hardly distinguishable from the conditions in November. December nights anticipate an average temperature of 18.3°F (-7.6°C), a modest decline from the daytime.

Humidity

March, April and December, with an average relative humidity of 87%, are the most humid months.

Rainfall

The month with the most rainfall is December, when the rain falls for 11.9 days and typically aggregates up to 7.64" (194mm) of precipitation.

Snowfall

Months with snowfall in Seward are January through May, October through December. In December, in Seward, it is snowing for 12.9 days. Throughout December, 15.91" (404mm) of snow is accumulated. Throughout the year, there are 72 snowfall days, and 73.19" (1859mm) of snow is accumulated.

Ocean temperature

In December, the average ocean temperature in Seward is 43.3°F (6.3°C).
Note: Diving into 43.3°F (6.3°C) when it's under 50°F (10°C) can cause immediate cold shock symptoms, marked by hyperventilation.

Daylight

December has the shortest days of the year in Seward, Alaska, with an average of 6h and 0min of daylight.
On the first day of December, sunrise is at 9:35 am and sunset at 3:58 pm. On the last day of the month, sunrise is at 10:00 am and sunset at 4:01 pm AKST.

Sunshine

The months with the least sunshine in Seward are January and December, with an average of 3.1h of sunshine.

UV index

January, October through December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 1 during December translates into these guidelines:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. It's recommended to limit sun exposure when its radiation is at its peak during midday. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
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Frequently asked questions

How cold is December in Seward?

During December, Seward experiences an average high-temperature of 27°F (-2.8°C) and a low-temperature of 18.3°F (-7.6°C).

What are the most humid months in Seward?

The months with the highest humidity in Seward, Alaska, are March, April and December, with an average relative humidity of 87%.

What is the average humidity in December in Seward?

In December, the average relative humidity in Seward, Alaska, is 87%.

What is the wettest month in Seward?

The month with the most rainfall in Seward is December, when the rain falls for 11.9 days and typically aggregates up to 7.64" (194mm) of precipitation.

How much does it rain in Seward in December?

In Seward, Alaska, in December, during 11.9 rainfall days, 7.64" (194mm) of precipitation is typically accumulated.

How many days does it snow in December in Seward?

In December, it is snowing for 12.9 days. Throughout December, 15.91" (404mm) of snow is accumulated.

What is the water temperature in December in Seward?

In Seward, Alaska, the average seawater temperature in December is 43.3°F (6.3°C). Swimming in 43.3°F (6.3°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the month with the shortest days in Seward?

With an average of 6h and 0min of daylight, December has the shortest days of the year in Seward, Alaska.

How many hours of daylight does Seward have in December?

In Seward, Alaska, the average day length in December is 6h and 0min.

What time are sunrise and sunset in December in Seward?

In December, on the first day of the month, sunrise is at 9:35 am and sunset at 3:58 pm. On the last day of the month, sunrise is at 10:00 am and sunset at 4:01 pm AKST.

What are the months with the least sunshine in Seward?

The months with the least sunshine in Seward, Alaska, are January and December, with an average of 3.1h of sunshine.

How long on average sun shines in December in Seward?

In December, the average sunshine duration is 3.1h.

When is the lowest UV index in Seward?

The months with the lowest UV index in Seward are January, October through December, with an average maximum UV index of 1.

How high is the UV index in December in Seward?

The average daily maximum UV index in December in Seward, Alaska, is 1. A UV Index reading of 2, and below, represents a low health risk 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
Seward, AK

Average temperature in December - Seward, AK
  • Average high temperature in December: 27°F

The warmest month (with the highest average high temperature) is July (56.8°F).
The month with the lowest average high temperature is January (24.6°F).

  • Average low temperature in December: 18.3°F

The month with the highest average low temperature is July (47.8°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).

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Average pressure in December
Seward, AK

Average pressure in December - Seward, AK
  • Average pressure in December: 29.62"Hg

The month with the highest atmospheric pressure is July (29.98"Hg).
The month with the lowest atmospheric pressure is November (29.61"Hg).

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Average wind speed in December
Seward, AK

Average wind speed in December - Seward, AK
  • Average wind speed in December: 8.4mph

The windiest month (with the highest average wind speed) is November (8.9mph).
The calmest month (with the lowest average wind speed) is June (4.8mph).

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Average humidity in December
Seward, AK

Average humidity in December - Seward, AK
  • Average humidity in December: 87%

The months with the highest relative humidity are March, April and December (87%).
The month with the lowest relative humidity is June (80%).

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Average rainfall in December
Seward, AK

Average rainfall in December - Seward, AK
  • Average rainfall in December: 7.64"

The wettest month (with the highest rainfall) is December (7.64").
The driest month (with the least rainfall) is June (2.09").

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Average rainfall days in December
Seward, AK

Average rainfall days in December - Seward, AK
  • Average rainfall days in December: 11.9 days

The month with the highest number of rainy days is August (19 days).
The month with the least rainy days is February (7.6 days).

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Average snowfall in December
Seward, AK

Average snowfall in December - Seward, AK
  • Average snowfall in December: 15.91"

The month with the highest snowfall is February (18.35").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Seward, AK

Average snowfall days in December - Seward, AK
  • Average snowfall days in December: 12.9 days

The month with the highest number of snowfall days is March (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in December
Seward, AK

Average sea temperature in December - Seward, AK
  • Average sea temperature in December: 43.3°F

The best month for swimming (with the highest average sea temperature) is August (56°F).
The coldest month (with the lowest average sea temperature) is March (39°F).

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

Average daylight in December / Average sunshine in December - Seward, AK
  • Average daylight in December: 6h and 0min

The month with the longest days is June (Average daylight: 18h and 48min).
The month with the shortest days is December (Average daylight: 6h and 0min).

  • Average sunshine in December: 3h and 1min

The month with the most sunshine is June (Average sunshine: 9h and 30min).
The months with the least sunshine are January and December (Average sunshine: 3h and 6min).

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Average sunshine days in December
Seward, AK

Average sunshine days in December - Seward, AK
  • Average sunshine days in December: 11 days

The month with the most sunshine days is January (13.8 days).
The month with the least sunshine days is September (10.6 days).

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Average UV index in December
Seward, AK

Average UV index in December - Seward, AK
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, October, November and December (UV index 1).

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Average cloud cover in December
Seward, AK

Average cloud cover in December - Seward, AK
  • Average cloud cover in December: 55

The month with the most cloud cover is December (Cloud cover 55).
The months with the least cloud cover are March and November (Cloud cover 50).

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Average visibility in December
Seward, AK

Average visibility in December - Seward, AK
  • Average visibility in December: 5mi

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

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Seward, Alaska, USA

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