December weather forecast and climate
Port Heiden, AK

Weather in December

The first month of the winter, December, is also a wintry month in Port Heiden, Alaska, with average temperature fluctuating between 32.4°F (0.2°C) and 27.5°F (-2.5°C).

Temperature

In Port Heiden, the average high-temperature in December is relatively the same as in November - a still cold 32.4°F (0.2°C). In December, the average low-temperature is 27.5°F (-2.5°C).

Humidity

In December, the average relative humidity is 85%.

Rainfall

In Port Heiden, during 11.2 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. In Port Heiden, Alaska, during the entire year, the rain falls for 160.7 days and collects up to 16.57" (421mm) of precipitation.

Snowfall

Months with snowfall in Port Heiden are January through May, September through December. December is the month with the most snowfall in Port Heiden, Alaska. Snow falls for 15.1 days and accumulates 5.71" (145mm) of snow.

Daylight

The month with the shortest days in Port Heiden is December, with an average of 6.8h of daylight.

Sunshine

With an average of 2.4h of sunshine, December has the least sunshine of the year in Port Heiden, Alaska.

UV index

Months with the lowest UV index in Port Heiden, Alaska, are February, March, November and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to the UV radiation for average individuals.
Note: The daily maximum UV index of 1 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. 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 temperature in December in Port Heiden?

In December, in Port Heiden, the average high-temperature is 32.4°F (0.2°C), and the average low-temperature is 27.5°F (-2.5°C).

What is the average humidity in December in Port Heiden?

In Port Heiden, the average relative humidity in December is 85%.

How many days does it rain in December in Port Heiden?

In Port Heiden, Alaska, in December, it is raining for 11.2 days, with typically 2.01" (51mm) of accumulated precipitation.

How much does it snow in Port Heiden in December?

In Port Heiden, Alaska, during December, snow falls for 15.1 days and regularly aggregates up to 5.71" (145mm) of snow.

What is the snowiest month in Port Heiden?

The month with the most snowfall is December when snow falls for 15.1 days and typically aggregates up to 5.71" (145mm) of snow.

What is the month with the shortest days in Port Heiden?

With an average of 6.8h of daylight, December has the shortest days of the year in Port Heiden.

How many hours of daylight does Port Heiden have in December?

In December, the average length of the day is 6.8h.

What is the month with the least sunshine in Port Heiden?

December has the least sunshine of the year in Port Heiden, Alaska, with an average of 2.4h of sunshine.

How many hours of sunshine does Port Heiden have in December?

In Port Heiden, the average sunshine in December is 2.4h.

What is the month with the lowest UV index in Port Heiden?

February, March, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Port Heiden.

What is the UV index intensity in December in Port Heiden?

The average daily maximum UV index in December is 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation.

Average temperature in December
Port Heiden, AK

Average temperature in December - Port Heiden, AK
  • Average high temperature in December: 32.4°F

The warmest month (with the highest average high temperature) is August (56.8°F).
The month with the lowest average high temperature is January (28.9°F).

  • Average low temperature in December: 27.5°F

The month with the highest average low temperature is August (49.1°F).
The coldest months (with the lowest average low temperature) are January and March (23.4°F).

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Average pressure in December
Port Heiden, AK

Average pressure in December - Port Heiden, AK
  • Average pressure in December: 29.54"

The month with the highest atmospheric pressure is July (29.97").
The month with the lowest atmospheric pressure is December (29.54").

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Average wind speed in December
Port Heiden, AK

Average wind speed in December - Port Heiden, AK
  • Average wind speed in December: 14.8mph

The windiest month (with the highest average wind speed) is December (14.8mph).
The calmest month (with the lowest average wind speed) is July (9.1mph).

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Average humidity in December
Port Heiden, AK

Average humidity in December - Port Heiden, AK
  • Average humidity in December: 85%

The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is May (78%).

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Average rainfall in December
Port Heiden, AK

Average rainfall in December - Port Heiden, AK
  • Average rainfall in December: 2.01"

The wettest month (with the highest rainfall) is October (2.17").
The driest month (with the least rainfall) is June (0.83").

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Average rainfall days in December
Port Heiden, AK

Average rainfall days in December - Port Heiden, AK
  • Average rainfall days in December: 11.2 days

The month with the highest number of rainy days is September (19.2 days).
The month with the least rainy days is March (7.6 days).

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Average snowfall in December
Port Heiden, AK

Average snowfall in December - Port Heiden, AK
  • Average snowfall in December: 5.71"

The month with the highest snowfall is December (5.71").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in December
Port Heiden, AK

Average snowfall days in December - Port Heiden, AK
  • Average snowfall days in December: 15.1 days

The month with the highest number of snowfall days is December (15.1 days).
Months with the least snowfall days are June, July and August (0 days).

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Average daylight in December /
Average sunshine in December
Port Heiden, AK

Average daylight in December / Average sunshine in December - Port Heiden, AK
  • Average daylight in December: 6.8h

The month with the longest days is June (Average daylight: 17.8h).
The month with the shortest days is December (Average daylight: 6.8h).

  • Average sunshine in December: 2.4h

The month with the most sunshine is May (Average sunshine: 7.7h).
The month with the least sunshine is December (Average sunshine: 2.4h).

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Average sunshine days in December
Port Heiden, AK

Average sunshine days in December - Port Heiden, AK
  • Average sunshine days in December: 6.7 days

The month with the most sunshine days is May (13 days).
The month with the least sunshine days is November (6 days).

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Average UV index in December
Port Heiden, AK

Average UV index in December - Port Heiden, AK
  • Average UV index in December: 1

Months with the highest UV index are May, June, July, August and September (UV index 3).
Months with the lowest UV index are February, March, November and December (UV index 1).

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Average cloud cover in December
Port Heiden, AK

Average cloud cover in December - Port Heiden, AK
  • Average cloud cover in December: 67

The month with the most cloud cover is July (Cloud cover 69).
The month with the least cloud cover is May (Cloud cover 59).

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Average visibility in December
Port Heiden, AK

Average visibility in December - Port Heiden, AK
  • Average visibility in December: 5mi

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

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