December weather forecast
Port Townsend, WA

Victorian design houses from an old age along the beach on a hilly spot overlooking the sea, in Port Townsend, Washington
Victorian design houses from an old age along the beach on a hilly spot overlooking the sea, in Port Townsend, Washington

Weather in December

December, the first month of the winter in Port Townsend, is still a chilly month, with an average temperature varying between 43°F (6.1°C) and 37.6°F (3.1°C).

Temperature

With an average high-temperature of 43°F (6.1°C) and an average low-temperature of 37.6°F (3.1°C), December is the coldest month.

Humidity

In December, the average relative humidity in Port Townsend, Washington, is 82%.

Rainfall

In Port Townsend, during December, the rain falls for 18.2 days and regularly aggregates up to 2.52" (64mm) of precipitation. Throughout the year, there are 180.3 rainfall days, and 21.85" (555mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December. In Port Townsend, in December, snow falls for 1 days, with typically accumulated 0.2" (5mm) of snow. In Port Townsend, Washington, during the entire year, snow falls for 7.8 days and aggregates up to 4.84" (123mm) of snow.

Ocean temperature

In Port Townsend, Washington, the average seawater temperature in December is 46.2°F (7.9°C).
Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

The month with the shortest days is December, with an average of 8h and 26min of daylight.
On the first day of the month, sunrise is at 7:40 am and sunset at 4:19 pm. On the last day of December, in Port Townsend, sunrise is at 8:01 am and sunset at 4:26 pm PST.

Sunshine

In December, the average sunshine in Port Townsend is 4.9h.

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 low threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: The average daily UV index of 2 in December transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in Port Townsend?

The coldest month in Port Townsend is December, with an average high-temperature of 43°F (6.1°C) and an average low-temperature of 37.6°F (3.1°C).

What is the temperature in December in Port Townsend?

In December, in Port Townsend, the average high-temperature is 43°F (6.1°C), and the average low-temperature is 37.6°F (3.1°C).

What is the average humidity in December in Port Townsend?

The average relative humidity in December in Port Townsend is 82%.

How much does it rain in Port Townsend in December?

In Port Townsend, during December, the rain falls for 18.2 days and regularly aggregates up to 2.52" (64mm) of precipitation.

How much does it snow in Port Townsend in December?

In Port Townsend, Washington, in December, during 1 snowfall days, 0.2" (5mm) of snow is typically accumulated.

How cold is the water in December in Port Townsend?

In Port Townsend, Washington, the average seawater temperature in December is 46.2°F (7.9°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

What is the month with the shortest days in Port Townsend?

December has the shortest days of the year, with an average of 8h and 26min of daylight.

What is the average length of the day in December in Port Townsend?

In Port Townsend, the average day length in December is 8h and 26min.

When are sunrise and sunset in December in Port Townsend?

In December, on the first day of the month, sunrise is at 7:40 am and sunset at 4:19 pm. On the last day of the month, in Port Townsend, Washington, sunrise is at 8:01 am and sunset at 4:26 pm PST.

How many hours of sunshine does Port Townsend have in December?

The average sunshine duration in December is 4.9h.

What are the months with the lowest UV index in Port Townsend?

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 Port Townsend?

In December, the average daily maximum UV index in Port Townsend, Washington, is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to Sun's UV rays.
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
Port Townsend, WA

Average temperature in December - Port Townsend, WA
  • Average high temperature in December: 43°F

The warmest month (with the highest average high temperature) is August (67.8°F).
The month with the lowest average high temperature is December (43°F).

  • Average low temperature in December: 37.6°F

The month with the highest average low temperature is August (55.4°F).
The coldest month (with the lowest average low temperature) is February (37.4°F).

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Average pressure in December
Port Townsend, WA

Average pressure in December - Port Townsend, WA
  • Average pressure in December: 30.06"Hg

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

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Average wind speed in December
Port Townsend, WA

Average wind speed in December - Port Townsend, WA
  • Average wind speed in December: 7.1mph

The windiest month (with the highest average wind speed) is November (7.4mph).
The calmest month (with the lowest average wind speed) is August (4mph).

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Average humidity in December
Port Townsend, WA

Average humidity in December - Port Townsend, WA
  • Average humidity in December: 82%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is July (75%).

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Average rainfall in December
Port Townsend, WA

Average rainfall in December - Port Townsend, WA
  • Average rainfall in December: 2.52"

The wettest month (with the highest rainfall) is November (2.91").
The driest month (with the least rainfall) is July (0.43").

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Average rainfall days in December
Port Townsend, WA

Average rainfall days in December - Port Townsend, WA
  • Average rainfall days in December: 18.2 days

The month with the highest number of rainy days is March (20.7 days).
The month with the least rainy days is August (6.6 days).

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Average snowfall in December
Port Townsend, WA

Average snowfall in December - Port Townsend, WA
  • Average snowfall in December: 0.2"

The month with the highest snowfall is February (2.87").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
Port Townsend, WA

Average snowfall days in December - Port Townsend, WA
  • Average snowfall days in December: 1 days

The month with the highest number of snowfall days is February (2.8 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
Port Townsend, WA

Average sea temperature in December - Port Townsend, 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
Port Townsend, WA

Average daylight in December / Average sunshine in December - Port Townsend, WA
  • Average daylight in December: 8h and 26min

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 26min).

  • Average sunshine in December: 4h and 54min

The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).

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Average sunshine days in December
Port Townsend, WA

Average sunshine days in December - Port Townsend, WA
  • Average sunshine days in December: 10.7 days

The month with the most sunshine days is August (22.3 days).
The month with the least sunshine days is March (8.2 days).

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Average UV index in December
Port Townsend, WA

Average UV index in December - Port Townsend, 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
Port Townsend, WA

Average cloud cover in December - Port Townsend, WA
  • Average cloud cover in December: 50

The months with the most cloud cover are January, February and December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 21).

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Average visibility in December
Port Townsend, WA

Average visibility in December - Port Townsend, 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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