December weather forecast and climate
Glennallen, AK

Weather in December

The first month of the winter, December, is still an extremely cold month in Glennallen, Alaska, with average temperature fluctuating between 11.5°F (-11.4°C) and 0.9°F (-17.3°C).

Temperature

In Glennallen, the average high-temperature in December is almost the same as in November - an extremely cold 11.5°F (-11.4°C). The average low-temperature, in December, is 0.9°F (-17.3°C).

Humidity

The average relative humidity in December is 89%.

Rainfall

In December, in Glennallen, Alaska, the rain falls for 5.5 days. Throughout December, 0.59" (15mm) of precipitation is accumulated. In Glennallen, during the entire year, the rain falls for 81.1 days and collects up to 5.71" (145mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall in Glennallen, Alaska. The month with the most snowfall in Glennallen, Alaska, is December when snow falls for 11.2 days and typically aggregates up to 4.57" (116mm) of snow.

Daylight

With an average of 5.3h of daylight, December has the shortest days of the year in Glennallen.

Sunshine

Months with the least sunshine in Glennallen are January and December, with an average of 3.9h of sunshine.

UV index

January through April, September through December, with an average maximum UV index of 2, are months with the lowest UV index in Glennallen. A UV Index reading of 2, and below, represents a minimal health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 2 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. 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. 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 Glennallen?

In Glennallen, in December, the average high-temperature is 11.5°F (-11.4°C), and the average low-temperature is 0.9°F (-17.3°C).

What is the average humidity in December in Glennallen?

In December, the average relative humidity is 89%.

How much does it rain in Glennallen in December?

In December, the rain falls for 5.5 days. Throughout December, 0.59" (15mm) of precipitation is accumulated.

How much does it snow in Glennallen in December?

In Glennallen, Alaska, during December, snow falls for 11.2 days and regularly aggregates up to 4.57" (116mm) of snow.

What is the snowiest month in Glennallen?

The month with the most snowfall in Glennallen is December when snow falls for 11.2 days and typically aggregates up to 4.57" (116mm) of snow.

What is the month with the shortest days in Glennallen?

December has the shortest days of the year in Glennallen, Alaska, with an average of 5.3h of daylight.

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

The average length of the day in December in Glennallen, Alaska, is 5.3h.

What is the month with the least sunshine in Glennallen?

January and December, with an average of 3.9h of sunshine, are months with the least sunshine.

How many hours of sunshine does Glennallen have in December?

In December, the average sunshine is 3.9h.

When is the lowest UV index in Glennallen?

Months with the lowest UV index in Glennallen, Alaska, are January through April, September through December, with an average maximum UV index of 2.

What is the UV index intensity in December in Glennallen?

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

Average temperature in December
Glennallen, AK

Average temperature in December - Glennallen, AK
  • Average high temperature in December: 11.5°F

The warmest month (with the highest average high temperature) is July (67.5°F).
The month with the lowest average high temperature is January (9.1°F).

  • Average low temperature in December: 0.9°F

The month with the highest average low temperature is July (47.5°F).
The coldest month (with the lowest average low temperature) is January (-1.8°F).

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Average pressure in December
Glennallen, AK

Average pressure in December - Glennallen, AK
  • Average pressure in December: 29.78"

The month with the highest atmospheric pressure is July (29.95").
Months with the lowest atmospheric pressure are September, October, November and December (29.78").

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Average wind speed in December
Glennallen, AK

Average wind speed in December - Glennallen, AK
  • Average wind speed in December: 4.5mph

The windiest month (with the highest average wind speed) is June (6.2mph).
The calmest months (with the lowest average wind speed) are January and December (4.5mph).

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Average humidity in December
Glennallen, AK

Average humidity in December - Glennallen, AK
  • Average humidity in December: 89%

The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is June (57%).

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Average rainfall in December
Glennallen, AK

Average rainfall in December - Glennallen, AK
  • Average rainfall in December: 0.59"

The wettest month (with the highest rainfall) is August (0.91").
The driest month (with the least rainfall) is April (0.2").

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Average rainfall days in December
Glennallen, AK

Average rainfall days in December - Glennallen, AK
  • Average rainfall days in December: 5.5 days

The month with the highest number of rainy days is August (11.3 days).
Months with the least rainy days are February and November (3.7 days).

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Average snowfall in December
Glennallen, AK

Average snowfall in December - Glennallen, AK
  • Average snowfall in December: 4.57"

The month with the highest snowfall is December (4.57").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in December
Glennallen, AK

Average snowfall days in December - Glennallen, AK
  • Average snowfall days in December: 11.2 days

The month with the highest number of snowfall days is December (11.2 days).
Months with the least snowfall days are June and July (0 days).

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

Average daylight in December / Average sunshine in December - Glennallen, AK
  • Average daylight in December: 5.3h

The month with the longest days is June (Average daylight: 19.6h).
The month with the shortest days is December (Average daylight: 5.3h).

  • Average sunshine in December: 3.9h

The month with the most sunshine is June (Average sunshine: 14.2h).
Months with the least sunshine are January and December (Average sunshine: 3.9).

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Average sunshine days in December
Glennallen, AK

Average sunshine days in December - Glennallen, AK
  • Average sunshine days in December: 20.4 days

The month with the most sunshine days is March (24.2 days).
The month with the least sunshine days is August (17.3 days).

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Average UV index in December
Glennallen, AK

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

The month with the highest UV index is July (UV index 5).
Months with the lowest UV index are January, February, March, April, September, October, November and December (UV index 2).

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Average cloud cover in December
Glennallen, AK

Average cloud cover in December - Glennallen, AK
  • Average cloud cover in December: 43

The month with the most cloud cover is December (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 33).

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Average visibility in December
Glennallen, AK

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

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

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