December weather forecast and climate
Koyuk, AK

Weather in December

The first month of the winter, December, is also a frigid cold month in Koyuk, Alaska, with average temperature varying between 5.4°F (-14.8°C) and 12.4°F (-10.9°C).

Temperature

In December, the average high-temperature marginally drops, from a freezing cold 19.6°F (-6.9°C) in November, to an extremely cold 12.4°F (-10.9°C). The average low-temperature, in Koyuk, is 5.4°F (-14.8°C).

Humidity

The average relative humidity in December is 91%.

Rainfall

In Koyuk, during December, the rain falls for 3.6 days and regularly aggregates up to 0.75" (19mm) of precipitation. In Koyuk, Alaska, during the entire year, the rain falls for 118.6 days and collects up to 13.39" (340mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall in Koyuk. In Koyuk, during December, snow falls for 15.1 days and regularly aggregates up to 4.21" (107mm) of snow. In Koyuk, during the entire year, snow falls for 94.3 days, and aggregates up to 27.2" (691mm) of snow.

Daylight

December has the shortest days of the year in Koyuk, Alaska, with an average of 3.9h of daylight.

Sunshine

In December, the average sunshine in Koyuk, Alaska, is 3h.

UV index

Months with the lowest UV index are January through March and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 1 interpret into the following advice:
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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in December in Koyuk?

In December, in Koyuk, Alaska, the average high-temperature is 12.4°F (-10.9°C), and the average low-temperature is 5.4°F (-14.8°C).

What is the average humidity in December in Koyuk?

In Koyuk, Alaska, the average relative humidity in December is 91%.

How many days does it rain in December in Koyuk?

In December, the rain falls for 3.6 days. Throughout December, 0.75" (19mm) of precipitation is accumulated.

How many days does it snow in December in Koyuk?

In December, it is snowing for 15.1 days. Throughout December, 4.21" (107mm) of snow is accumulated.

What is the month with the shortest days in Koyuk?

With an average of 3.9h of daylight, December has the shortest days of the year in Koyuk.

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

The average length of the day in December in Koyuk, Alaska, is 3.9h.

How many hours of sunshine does Koyuk have in December?

In December, the average sunshine in Koyuk is 3h.

What are the months with the lowest UV index in Koyuk?

Months with the lowest UV index in Koyuk, Alaska, are January through March and December, with an average maximum UV index of 1.

What is the UV index reading in December in Koyuk?

In December, the average daily maximum UV index is 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to the UV radiation.

Average temperature in December
Koyuk, AK

Average temperature in December - Koyuk, AK
  • Average high temperature in December: 12.4°F

The warmest month (with the highest average high temperature) is July (59.5°F).
The month with the lowest average high temperature is January (9.1°F).

  • Average low temperature in December: 5.4°F

The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is January (1.8°F).

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Average pressure in December
Koyuk, AK

Average pressure in December - Koyuk, AK
  • Average pressure in December: 29.75"

The month with the highest atmospheric pressure is May (29.92").
The month with the lowest atmospheric pressure is October (29.72").

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Average wind speed in December
Koyuk, AK

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

The windiest month (with the highest average wind speed) is October (9.6mph).
The calmest month (with the lowest average wind speed) is June (6mph).

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Average humidity in December
Koyuk, AK

Average humidity in December - Koyuk, AK
  • Average humidity in December: 91%

The month with the highest relative humidity is March (92%).
The month with the lowest relative humidity is June (72%).

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Average rainfall in December
Koyuk, AK

Average rainfall in December - Koyuk, AK
  • Average rainfall in December: 0.75"

The wettest month (with the highest rainfall) is August (2.24").
The driest month (with the least rainfall) is January (0.55").

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Average rainfall days in December
Koyuk, AK

Average rainfall days in December - Koyuk, AK
  • Average rainfall days in December: 3.6 days

The month with the highest number of rainy days is August (19.8 days).
The month with the least rainy days is January (2.7 days).

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Average snowfall in December
Koyuk, AK

Average snowfall in December - Koyuk, AK
  • Average snowfall in December: 4.21"

The month with the highest snowfall is November (4.76").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in December
Koyuk, AK

Average snowfall days in December - Koyuk, AK
  • Average snowfall days in December: 15.1 days

The month with the highest number of snowfall days is March (16.7 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
Koyuk, AK

Average daylight in December / Average sunshine in December - Koyuk, AK
  • Average daylight in December: 3.9h

The month with the longest days is June (Average daylight: 21.6h).
The month with the shortest days is December (Average daylight: 3.9h).

  • Average sunshine in December: 3h

The month with the most sunshine is May (Average sunshine: 8.3h).
The month with the least sunshine is June (Average sunshine: 2.9h).

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Average sunshine days in December
Koyuk, AK

Average sunshine days in December - Koyuk, AK
  • Average sunshine days in December: 15 days

The month with the most sunshine days is January (18.3 days).
The month with the least sunshine days is August (8.4 days).

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Average UV index in December
Koyuk, AK

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

The month with the highest UV index is July (UV index 4).
Months with the lowest UV index are January, February, March and December (UV index 1).

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Average cloud cover in December
Koyuk, AK

Average cloud cover in December - Koyuk, AK
  • Average cloud cover in December: 58

The month with the most cloud cover is August (Cloud cover 62).
The month with the least cloud cover is June (Cloud cover 50).

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Average visibility in December
Koyuk, AK

Average visibility in December - Koyuk, AK
  • Average visibility in December: 4mi

Months with the highest visibility are May, June, July, August, September and October (6mi).
Months with the lowest visibility are January, February, March, April and December (4mi).

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