December weather forecast
Oak Harbor, WA

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Weather in December

December, the first month of the winter in Oak Harbor, is also a frosty month, with an average temperature fluctuating between 43.7°F (6.5°C) and 38.3°F (3.5°C).

Temperature

December tends to be the coldest month, with temperatures averaging a daily high of 43.7°F (6.5°C) and a low of 38.3°F (3.5°C).

Humidity

The average relative humidity in December is 80%.

Rainfall

In Oak Harbor, during December, the rain falls for 18.7 days and regularly aggregates up to 2.76" (70mm) of precipitation. In Oak Harbor, during the entire year, the rain falls for 183.8 days and collects up to 24.45" (621mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall in Oak Harbor. In Oak Harbor, during December, snow falls for 1.6 days and regularly aggregates up to 0.28" (7mm) of snow. Throughout the year, there are 9.6 snowfall days, and 5.63" (143mm) of snow is accumulated.

Ocean temperature

In December, the average ocean temperature in Oak Harbor is 46.2°F (7.9°C).
Note: It is advised against swimming in 46.2°F (7.9°C) when it drops below 50°F (10°C). Such temperatures can cause extreme cold shock, leading to hyperventilation.

Daylight

With an average of 8h and 24min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:41 am and sunset at 4:18 pm. On the last day of the month, sunrise is at 8:01 am and sunset at 4:26 pm PST.

Sunshine

With an average of 4.6h of sunshine, December has the least sunshine of the year in Oak Harbor.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Oak Harbor. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index of 2 during December leads to these instructions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
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Frequently asked questions

What month is the coldest in Oak Harbor?

December proves to be the coldest month in Oak Harbor, recording an average maximum temperature of 43.7°F (6.5°C) and a minimum temperature of 38.3°F (3.5°C).

Is December cold in Oak Harbor?

In Oak Harbor, 43.7°F (6.5°C) is the average high-temperature and 38.3°F (3.5°C) is the average low-temperature during December.

What is the average humidity in December in Oak Harbor?

The average relative humidity in December is 80%.

How much does it rain in Oak Harbor in December?

In Oak Harbor, Washington, during December, the rain falls for 18.7 days and regularly aggregates up to 2.76" (70mm) of precipitation.

How many days does it snow in December in Oak Harbor?

In Oak Harbor, in December, snow falls for 1.6 days, with typically accumulated 0.28" (7mm) of snow.

What is the water temperature in December in Oak Harbor?

In Oak Harbor, in December, the average water temperature is 46.2°F (7.9°C). Swimming in 46.2°F (7.9°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the month with the shortest days in Oak Harbor?

December has the shortest days of the year in Oak Harbor, Washington, with an average of 8h and 24min of daylight.

How many hours of daylight does Oak Harbor have in December?

In December, the average day length is 8h and 25min.

When are sunrise and sunset in December in Oak Harbor?

On the first day of December in Oak Harbor, Washington, sunrise is at 7:41 am and sunset at 4:18 pm. On the last day of the month, sunrise is at 8:01 am and sunset at 4:26 pm PST.

What is the month with the least sunshine in Oak Harbor?

With an average of 4.6h of sunshine, December has the least sunshine of the year in Oak Harbor.

How long on average sun shines in December in Oak Harbor?

In Oak Harbor, the average sunshine duration in December is 4.6h.

What are the months with the lowest UV index in Oak Harbor?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What is the UV index reading in December in Oak Harbor?

The average daily maximum UV index in December in Oak Harbor is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health 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
Oak Harbor, WA

Average temperature in December - Oak Harbor, WA
  • Average high temperature in December: 43.7°F

The warmest month (with the highest average high temperature) is July (66.2°F).
The month with the lowest average high temperature is December (43.7°F).

  • Average low temperature in December: 38.3°F

The month with the highest average low temperature is August (55.9°F).
The coldest month (with the lowest average low temperature) is February (37.9°F).

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Average pressure in December
Oak Harbor, WA

Average pressure in December - Oak Harbor, WA
  • Average pressure in December: 30.07"Hg

The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).

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Average wind speed in December
Oak Harbor, WA

Average wind speed in December - Oak Harbor, WA
  • Average wind speed in December: 8.1mph

The windiest month (with the highest average wind speed) is November (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

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Average humidity in December
Oak Harbor, WA

Average humidity in December - Oak Harbor, WA
  • Average humidity in December: 80%

The months with the highest relative humidity are January, February and March (81%).
The month with the lowest relative humidity is July (76%).

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Average rainfall in December
Oak Harbor, WA

Average rainfall in December - Oak Harbor, WA
  • Average rainfall in December: 2.76"

The wettest month (with the highest rainfall) is November (3.46").
The driest month (with the least rainfall) is July (0.47").

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Average rainfall days in December
Oak Harbor, WA

Average rainfall days in December - Oak Harbor, WA
  • Average rainfall days in December: 18.7 days

The month with the highest number of rainy days is March (21.1 days).
The month with the least rainy days is August (7.5 days).

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Average snowfall in December
Oak Harbor, WA

Average snowfall in December - Oak Harbor, WA
  • Average snowfall in December: 0.28"

The month with the highest snowfall is February (3.27").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
Oak Harbor, WA

Average snowfall days in December - Oak Harbor, WA
  • Average snowfall days in December: 1.6 days

The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in December
Oak Harbor, WA

Average sea temperature in December - Oak Harbor, WA
  • Average sea temperature in December: 46.2°F

The best month for swimming (with the highest average sea temperature) is August (53°F).
The coldest month (with the lowest average sea temperature) is February (45°F).

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Average daylight in December /
Average sunshine in December
Oak Harbor, WA

Average daylight in December / Average sunshine in December - Oak Harbor, WA
  • Average daylight in December: 8h and 2min

The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).

  • Average sunshine in December: 4h and 4min

The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).

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Average sunshine days in December
Oak Harbor, WA

Average sunshine days in December - Oak Harbor, WA
  • Average sunshine days in December: 10.5 days

The month with the most sunshine days is August (21.7 days).
The month with the least sunshine days is March (7.5 days).

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Average UV index in December
Oak Harbor, WA

Average UV index in December - Oak Harbor, WA
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in December
Oak Harbor, WA

Average cloud cover in December - Oak Harbor, WA
  • Average cloud cover in December: 52

The month with the most cloud cover is December (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 22).

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Average visibility in December
Oak Harbor, WA

Average visibility in December - Oak Harbor, WA
  • Average visibility in December: 6mi

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

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Oak Harbor, Washington, USA

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