December weather forecast
Kenai, AK

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High rock cliffs of the scenic Spire Cove in Fjords National Park in Kenai, Alaska
High rock cliffs of the scenic Spire Cove in Fjords National Park in Kenai, Alaska

Weather in December

In Kenai, December manifests the full wrath of winter with heavy snowfall escalating to 8.74" (222mm). Adorned with a thick layer of snow, the city transforms into a white winter paradise. However, limited hours of daylight and meager sunshine hours paint a monochromatic hue to the city's landscape. An increased UV index prevails, making it imperative to bear necessary winter protection. On observing the wind speeds of 9.6mph (15.4km/h) pointing towards gustier conditions, it becomes increasingly essential for locals and visitors alike to ensure adequate safety.

Temperature

Kenai experiences an average high-temperature of a still freezing cold 27°F (-2.8°C) in December, marking an insignificant shift from 31.1°F (-0.5°C) in November. Kenai welcomes an average low temperature of 21.2°F (-6°C) in December, a gentle shift from the day's high.

Humidity

The average relative humidity in December in Kenai is 85%.

Rainfall

In December, the rain falls for 7.1 days. Throughout December, 1.93" (49mm) of precipitation is accumulated. In Kenai, during the entire year, the rain falls for 136.3 days and collects up to 19.49" (495mm) of precipitation.

Snowfall

Months with snowfall are January through April, September through December. December is the month with the most snowfall. Snow falls for 12.7 days and accumulates 8.74" (222mm) of snow.

Ocean temperature

In December, the average ocean temperature is 38.8°F (3.8°C).
Note: In relation to swimming, the extreme cold, danger, and potential fatality of this situation are apparent. Without suitable insulated waterproof clothing, the onset of hypothermia is quick.

Daylight

The month with the shortest days in Kenai, Alaska, is December, with an average of 5h and 54min of daylight.
On the first day of December in Kenai, sunrise is at 9:46 am and sunset at 4:02 pm. On the last day of the month, sunrise is at 10:12 am and sunset at 4:04 pm AKST.

Sunshine

December has the least sunshine of the year, with an average of 2.9h of sunshine.

UV index

The average daily maximum UV index in December in Kenai is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: In December, the average maximum UV index of 2 translates into the following recommendations:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Opt for tightly woven and loose clothing to enhance protection from the Sun. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
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Frequently asked questions

How cold is it in Kenai in December?

The high-temperature, in December, in Kenai, records 27°F (-2.8°C), while the low-temperature is 21.2°F (-6°C).

What is the average humidity in December in Kenai?

In Kenai, Alaska, the average relative humidity in December is 85%.

How many days does it rain in December in Kenai?

In December, the rain falls for 7.1 days. Throughout December, 1.93" (49mm) of precipitation is accumulated.

When does it snow the most in Kenai?

The month with the most snowfall in Kenai is December, when snow falls for 12.7 days and typically aggregates up to 8.74" (222mm) of snow.

How much does it snow in Kenai in December?

In December, in Kenai, Alaska, it is snowing for 12.7 days. Throughout December, 8.74" (222mm) of snow is accumulated.

How cold is the water in December in Kenai?

In Kenai, Alaska, the average seawater temperature in December is 38.8°F (3.8°C). For swimming, this is considered very dangerous and immediately life-threatening. Total loss of breathing control instantly occurs, and clear thinking becomes almost impossible. A specialized swimsuit is obligatory to minimize thermal loss.

What is the month with the shortest days in Kenai?

The month with the shortest days in Kenai is December, with an average of 5h and 54min of daylight.

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

In Kenai, the average day length in December is 5h and 52min.

When are sunrise and sunset in December in Kenai?

In December, on the first day of the month, sunrise is at 9:46 am and sunset at 4:02 pm. On the last day of the month, in Kenai, sunrise is at 10:12 am and sunset at 4:04 pm AKST.

What is the month with the least sunshine in Kenai?

The month with the least sunshine in Kenai is December, with an average of 2.9h of sunshine.

How long on average sun shines in December in Kenai?

In Kenai, Alaska, the average sunshine duration in December is 2.9h.

How high is the UV index in December in Kenai?

The average daily maximum UV index in December in Kenai, Alaska, is 2. A UV Index reading of 2, and below, represents a low health threat from exposure to the Sun's UV radiation.
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
Kenai, AK

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

The warmest month (with the highest average high temperature) is July (61.3°F).
The month with the lowest average high temperature is January (24.3°F).

  • Average low temperature in December: 21.2°F

The month with the highest average low temperature is July (51.3°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).

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Average pressure in December
Kenai, AK

Average pressure in December - Kenai, AK
  • Average pressure in December: 29.64"Hg

The month with the highest atmospheric pressure is July (29.96"Hg).
The month with the lowest atmospheric pressure is December (29.64"Hg).

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Average wind speed in December
Kenai, AK

Average wind speed in December - Kenai, AK
  • Average wind speed in December: 9.6mph

The windiest month (with the highest average wind speed) is December (9.6mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

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Average humidity in December
Kenai, AK

Average humidity in December - Kenai, AK
  • Average humidity in December: 85%

The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is May (69%).

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Average rainfall in December
Kenai, AK

Average rainfall in December - Kenai, AK
  • Average rainfall in December: 1.93"

The wettest month (with the highest rainfall) is October (2.87").
The driest month (with the least rainfall) is June (0.91").

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Average rainfall days in December
Kenai, AK

Average rainfall days in December - Kenai, AK
  • Average rainfall days in December: 7.1 days

The month with the highest number of rainy days is September (16.6 days).
The month with the least rainy days is February (5.5 days).

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Average snowfall in December
Kenai, AK

Average snowfall in December - Kenai, AK
  • Average snowfall in December: 8.74"

The month with the highest snowfall is December (8.74").
The months with the least snowfall are May, June, July and August (0").

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Average snowfall days in December
Kenai, AK

Average snowfall days in December - Kenai, AK
  • Average snowfall days in December: 12.7 days

The month with the highest number of snowfall days is December (12.7 days).
The months with the least snowfall days are June, July and August (0 days).

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Average sea temperature in December
Kenai, AK

Average sea temperature in December - Kenai, AK
  • Average sea temperature in December: 38.8°F

The best month for swimming (with the highest average sea temperature) is August (53.4°F).
The coldest month (with the lowest average sea temperature) is February (34.2°F).

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

Average daylight in December / Average sunshine in December - Kenai, AK
  • Average daylight in December: 5h and 5min

The month with the longest days is June (Average daylight: 18h and 54min).
The month with the shortest days is December (Average daylight: 5h and 54min).

  • Average sunshine in December: 2h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 2h and 54min).

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Average sunshine days in December
Kenai, AK

Average sunshine days in December - Kenai, AK
  • Average sunshine days in December: 14 days

The month with the most sunshine days is June (16.6 days).
The month with the least sunshine days is September (11.5 days).

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Average UV index in December
Kenai, AK

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

The months with the highest UV index are June and July (UV index 4).
The month with the lowest UV index is January (UV index 1).

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Average cloud cover in December
Kenai, AK

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

The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is June (Cloud cover 44).

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Average visibility in December
Kenai, AK

Average visibility in December - Kenai, AK
  • Average visibility in December: 6mi

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

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Kenai, Alaska, USA

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