December weather forecast and climate
Ruby, AK

Weather in December

The first month of the winter, December, is still a polar cold month in Ruby, Alaska, with average temperature varying between 3.9°F (-15.6°C) and -5.4°F (-20.8°C).

Temperature

In Ruby, the average high-temperature marginally drops, from a frigid cold 10.6°F (-11.9°C) in November, to an arctic cold 3.9°F (-15.6°C). The average low-temperature, in Ruby, is -5.4°F (-20.8°C).

Humidity

In December, the average relative humidity in Ruby is 95%.

Rainfall

In Ruby, Alaska, during 2.5 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. In Ruby, during the entire year, the rain falls for 116.7 days and collects up to 14.8" (376mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall in Ruby. The month with the most snowfall is December when snow falls for 17.5 days and typically aggregates up to 8.62" (219mm) of snow.

Daylight

The month with the shortest days in Ruby, Alaska, is December, with an average of 4h of daylight.

Sunshine

The month with the least sunshine is December, with an average of 2.3h of sunshine.

UV index

Months with the lowest UV index are January through March, October through December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to the UV radiation for the ordinary person.
Note: In December, the average maximum UV index of 1 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged 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 Ruby?

In Ruby, in December, the average high-temperature is 3.9°F (-15.6°C), and the average low-temperature is -5.4°F (-20.8°C).

What is the average humidity in December in Ruby?

In December, the average relative humidity is 95%.

How much does it rain in Ruby in December?

In Ruby, in December, it is raining for 2.5 days, with typically 1.14" (29mm) of accumulated precipitation.

How many days does it snow in December in Ruby?

In December, in Ruby, Alaska, it is snowing for 17.5 days. Throughout December, 8.62" (219mm) of snow is accumulated.

What is the snowiest month in Ruby?

December is the month with the most snowfall in Ruby, Alaska. Snow falls for 17.5 days and accumulates 8.62" (219mm) of snow.

What is the month with the shortest days in Ruby?

December has the shortest days of the year, with an average of 4h of daylight.

How many hours of daylight does Ruby have in December?

In December, the average length of the day in Ruby, Alaska, is 4h.

What is the month with the least sunshine in Ruby?

The month with the least sunshine in Ruby, Alaska, is December, with an average of 2.3h of sunshine.

How long on average sun shines in December in Ruby?

In December, the average sunshine is 2.3h.

When is the lowest UV index in Ruby?

January through March, October through December, with an average maximum UV index of 1, are months with the lowest UV index in Ruby, Alaska.

What is the UV index intensity in December in Ruby?

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

Average temperature in December
Ruby, AK

Average temperature in December - Ruby, AK
  • Average high temperature in December: 3.9°F

The warmest month (with the highest average high temperature) is July (67.3°F).
The month with the lowest average high temperature is January (-0.8°F).

  • Average low temperature in December: -5.4°F

The month with the highest average low temperature is July (49.5°F).
The coldest month (with the lowest average low temperature) is January (-10.5°F).

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Average pressure in December
Ruby, AK

Average pressure in December - Ruby, AK
  • Average pressure in December: 29.81"

The month with the highest atmospheric pressure is February (29.93").
Months with the lowest atmospheric pressure are September and October (29.76").

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Average wind speed in December
Ruby, AK

Average wind speed in December - Ruby, AK
  • Average wind speed in December: 4.7mph

The windiest month (with the highest average wind speed) is September (5.2mph).
The calmest month (with the lowest average wind speed) is January (4.6mph).

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Average humidity in December
Ruby, AK

Average humidity in December - Ruby, AK
  • Average humidity in December: 95%

Months with the highest relative humidity are January, February and March (96%).
The month with the lowest relative humidity is June (59%).

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Average rainfall in December
Ruby, AK

Average rainfall in December - Ruby, AK
  • Average rainfall in December: 1.14"

The wettest month (with the highest rainfall) is August (2.05").
The driest month (with the least rainfall) is January (0.59").

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Average rainfall days in December
Ruby, AK

Average rainfall days in December - Ruby, AK
  • Average rainfall days in December: 2.5 days

The month with the highest number of rainy days is August (19 days).
Months with the least rainy days are January and February (2.3 days).

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Average snowfall in December
Ruby, AK

Average snowfall in December - Ruby, AK
  • Average snowfall in December: 8.62"

The month with the highest snowfall is December (8.62").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in December
Ruby, AK

Average snowfall days in December - Ruby, AK
  • Average snowfall days in December: 17.5 days

The month with the highest number of snowfall days is March (20.3 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
Ruby, AK

Average daylight in December / Average sunshine in December - Ruby, AK
  • Average daylight in December: 4h

The month with the longest days is June (Average daylight: 21.4h).
The month with the shortest days is December (Average daylight: 4h).

  • Average sunshine in December: 2.3h

The month with the most sunshine is May (Average sunshine: 8.1h).
The month with the least sunshine is December (Average sunshine: 2.3h).

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Average sunshine days in December
Ruby, AK

Average sunshine days in December - Ruby, AK
  • Average sunshine days in December: 14.5 days

The month with the most sunshine days is January (18 days).
The month with the least sunshine days is April (6.5 days).

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Average UV index in December
Ruby, AK

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

Months with the highest UV index are May, June and July (UV index 4).
Months with the lowest UV index are January, February, March, October, November and December (UV index 1).

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Average cloud cover in December
Ruby, AK

Average cloud cover in December - Ruby, AK
  • Average cloud cover in December: 68

The month with the most cloud cover is April (Cloud cover 77).
The month with the least cloud cover is June (Cloud cover 47).

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Average visibility in December
Ruby, AK

Average visibility in December - Ruby, AK
  • Average visibility in December: 2mi

Months with the highest visibility are June and July (6mi).
Months with the lowest visibility are January, February, March, April and December (2mi).

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