December weather forecast
Vancouver, WA

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The intricate design of the road acting as a bridge over a calm, blue river in Vancouver, Washington
The intricate design of the road acting as a bridge over a calm, blue river in Vancouver, Washington

Weather in December

By the time December arrives, winter is in full swing and the cityscape of Vancouver, Washington transforms to match the season. The wintry month sees a considerable decrease in temperature, with the city chilling under an average low temperature of 34°F (1.1°C). Despite the occasional bouts of frost, the city retains its festive cheer and the winter cold is no deterrent to the season's gaiety. Canopies of Christmas lights that line residential areas provide a beautiful contrast to the pale winter sky. However, winter is not particularly stern here, having a light snowfall of 0.35" (9mm), it is all about enjoying the cold without the discomfort associated with heavy snowfall.

Temperature

Vancouver reaches its lowest average temperatures in December, measuring 43.7°F (6.5°C) at the peak and 34°F (1.1°C) at the lowest.

Humidity

In Vancouver, the average relative humidity in December is 83%.

Rainfall

December is the month with the most rainfall in Vancouver. Rain falls for 19.6 days and accumulates 5.08" (129mm) of precipitation.

Snowfall

Months with snowfall in Vancouver are January through March, November and December. In Vancouver, in December, snow falls for 0.6 days, with typically accumulated 0.35" (9mm) of snow. Throughout the year, there are 5.9 snowfall days, and 3.74" (95mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 8h and 48min of daylight.
On the first day of December, sunrise is at 7:31 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:51 am and sunset at 4:36 pm PST.

Sunshine

In Vancouver, the average sunshine in December is 4.2h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The maximum UV index, 2 during December, leads to the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Stay sun-safe with clothing that is both closely woven and worn loosely. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
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Frequently asked questions

What time of the year is the coldest in Vancouver?

December is the coldest month in Vancouver, Washington, exhibiting average temperatures of 43.7°F (6.5°C) at the peak and 34°F (1.1°C) at the base.

How cold is December in Vancouver?

In Vancouver, 43.7°F (6.5°C) is the average high-temperature and 34°F (1.1°C) is the average low-temperature during December. The average heat index (a.k.a. 'feels like', 'apparent temperature'), which represents the influence of relative humidity on air temperature, in August is evaluated at 82.4°F (28°C).

What is the average humidity in December in Vancouver?

The average relative humidity in December in Vancouver, Washington, is 83%.

What is the rainiest month in Vancouver?

December is the month with the most rainfall in Vancouver. Rain falls for 19.6 days and accumulates 5.08" (129mm) of precipitation.

How many days does it rain in December in Vancouver?

In Vancouver, Washington, in December, it is raining for 19.6 days, with typically 5.08" (129mm) of accumulated precipitation.

How much does it snow in Vancouver in December?

In Vancouver, Washington, during December, snow falls for 0.6 days and regularly aggregates up to 0.35" (9mm) of snow.

What is the month with the shortest days in Vancouver?

The month with the shortest days is December, with an average of 8h and 48min of daylight.

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

The average day length in December is 8h and 46min.

What time are sunrise and sunset in December in Vancouver?

In December, on the first day of the month, sunrise is at 7:31 am and sunset at 4:28 pm. On the last day of the month, in Vancouver, Washington, sunrise is at 7:51 am and sunset at 4:36 pm PST.

How long on average sun shines in December in Vancouver?

In December, the average sunshine duration in Vancouver is 4.2h.

When is the lowest UV index in Vancouver?

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

How high is the UV index in December in Vancouver?

In Vancouver, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability 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
Vancouver, WA

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

The warmest month (with the highest average high temperature) is August (80.6°F).
The month with the lowest average high temperature is December (43.7°F).

  • Average low temperature in December: 34°F

The month with the highest average low temperature is August (54°F).
The coldest month (with the lowest average low temperature) is December (34°F).

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Average pressure in December
Vancouver, WA

Average pressure in December - Vancouver, WA
  • Average pressure in December: 30.1"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).

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Average wind speed in December
Vancouver, WA

Average wind speed in December - Vancouver, WA
  • Average wind speed in December: 5.2mph

The windiest month (with the highest average wind speed) is January (5.5mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).

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Average humidity in December
Vancouver, WA

Average humidity in December - Vancouver, WA
  • Average humidity in December: 83%

The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is August (65%).

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Average rainfall in December
Vancouver, WA

Average rainfall in December - Vancouver, WA
  • Average rainfall in December: 5.08"

The wettest month (with the highest rainfall) is December (5.08").
The driest month (with the least rainfall) is July (0.35").

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Average rainfall days in December
Vancouver, WA

Average rainfall days in December - Vancouver, WA
  • Average rainfall days in December: 19.6 days

The month with the highest number of rainy days is March (20.6 days).
The month with the least rainy days is August (4.9 days).

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Average snowfall in December
Vancouver, WA

Average snowfall in December - Vancouver, WA
  • Average snowfall in December: 0.35"

The month with the highest snowfall is February (1.42").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Vancouver, WA

Average snowfall days in December - Vancouver, WA
  • Average snowfall days in December: 0.6 days

The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
Vancouver, WA

Average daylight in December / Average sunshine in December - Vancouver, WA
  • Average daylight in December: 8h and 5min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is August (Average sunshine: 11h and 0min).
The months with the least sunshine are January and February (Average sunshine: 4h and 6min).

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Average sunshine days in December
Vancouver, WA

Average sunshine days in December - Vancouver, WA
  • Average sunshine days in December: 9.9 days

The month with the most sunshine days is July (24.1 days).
The month with the least sunshine days is February (7.9 days).

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Average UV index in December
Vancouver, WA

Average UV index in December - Vancouver, WA
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 6).
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
Vancouver, WA

Average cloud cover in December - Vancouver, WA
  • Average cloud cover in December: 56

The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 23).

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Average visibility in December
Vancouver, WA

Average visibility in December - Vancouver, WA
  • Average visibility in December: 5mi

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

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Vancouver, Washington, USA

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