December weather forecast
Harbor, OR

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Weather in December

The first month of the winter, December, is also a fresh month in Harbor, Oregon, with temperature in the range of an average low of 43.2°F (6.2°C) and an average high of 50.9°F (10.5°C).

Temperature

Harbor's coldest month, December, generally records average temperatures ranging from a high of 50.9°F (10.5°C) to a low of 43.2°F (6.2°C).

Humidity

In Harbor, the average relative humidity in December is 79%.

Rainfall

The month with the most rainfall is December, when the rain falls for 17.1 days and typically aggregates up to 8.11" (206mm) of precipitation.

Snowfall

In Harbor, snow does not fall in January, March through December.

Ocean temperature

In Harbor, in December, the average water temperature is 52.2°F (11.2°C).
Note: Beware of 52.2°F (11.2°C) waters at 55.4°F (13°C), they're uninviting, and a dip below 50°F (10°C) has risks of breath loss and cold shock, contingent on health.

Daylight

December has the shortest days of the year in Harbor, with an average of 9h and 12min of daylight.
On the first day of the month, sunrise is at 7:26 am and sunset at 4:46 pm. On the last day of December, sunrise is at 7:45 am and sunset at 4:55 pm PST.

Sunshine

In Harbor, the average sunshine in December is 5h.

UV index

In December, the average daily maximum UV index in Harbor is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.
Note: A daily high UV index of 3 in December leads to these guidelines:
Guard yourself - Precautionary measures against sun damage are advocated. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
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Frequently asked questions

What month is the coldest in Harbor?

In Harbor, December is the month with the lowest recorded average temperatures, measuring a high of 50.9°F (10.5°C) and a low of 43.2°F (6.2°C).

What are December temperatures in Harbor?

Harbor in December has an average high-temperature of 50.9°F (10.5°C) and an average low-temperature of 43.2°F (6.2°C).

What is the average humidity in December in Harbor?

In Harbor, Oregon, the average relative humidity in December is 79%.

What is the rainiest month in Harbor?

December is the month with the most rainfall in Harbor, Oregon. Rain falls for 17.1 days and accumulates 8.11" (206mm) of precipitation.

How much does it rain in Harbor in December?

In Harbor, during December, the rain falls for 17.1 days and regularly aggregates up to 8.11" (206mm) of precipitation.

When it does not snow in Harbor?

January, March through December are months without snowfall in Harbor.

What is the ocean temperature in December in Harbor?

In Harbor, the average seawater temperature in December is 52.2°F (11.2°C). Swimming in 52.2°F (11.2°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 Harbor?

With an average of 9h and 12min of daylight, December has the shortest days of the year in Harbor.

How many hours of daylight does Harbor have in December?

In Harbor, the average day length in December is 9h and 10min.

What time are sunrise and sunset in December in Harbor?

On the first day of December in Harbor, sunrise is at 7:26 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 4:55 pm PST.

How many hours of sunshine does Harbor have in December?

In Harbor, Oregon, the average sunshine duration in December is 5h.

How high is the UV index in December in Harbor?

The average daily maximum UV index in December in Harbor is 3. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Harbor, OR

Average temperature in December - Harbor, OR
  • Average high temperature in December: 50.9°F

The warmest months (with the highest average high temperature) are July and August (68.5°F).
The month with the lowest average high temperature is December (50.9°F).

  • Average low temperature in December: 43.2°F

The month with the highest average low temperature is July (55°F).
The coldest month (with the lowest average low temperature) is February (43°F).

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Average pressure in December
Harbor, OR

Average pressure in December - Harbor, OR
  • Average pressure in December: 30.1"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are August and September (30"Hg).

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Average wind speed in December
Harbor, OR

Average wind speed in December - Harbor, OR
  • Average wind speed in December: 9.4mph

The windiest month (with the highest average wind speed) is June (10.1mph).
The calmest month (with the lowest average wind speed) is August (7.6mph).

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Average humidity in December
Harbor, OR

Average humidity in December - Harbor, OR
  • Average humidity in December: 79%

The month with the highest relative humidity is March (82%).
The months with the lowest relative humidity are July and September (76%).

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Average rainfall in December
Harbor, OR

Average rainfall in December - Harbor, OR
  • Average rainfall in December: 8.11"

The wettest month (with the highest rainfall) is December (8.11").
The driest month (with the least rainfall) is July (0.12").

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Average rainfall days in December
Harbor, OR

Average rainfall days in December - Harbor, OR
  • Average rainfall days in December: 17.1 days

The month with the highest number of rainy days is March (18.6 days).
The month with the least rainy days is July (2.2 days).

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Average snowfall in December
Harbor, OR

Average snowfall in December - Harbor, OR
  • Average snowfall in December: 0"

The month with the highest snowfall is February (0.71").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in December
Harbor, OR

Average snowfall days in December - Harbor, OR
  • Average snowfall days in December: 0.1 days

The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).

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Average sea temperature in December
Harbor, OR

Average sea temperature in December - Harbor, OR
  • Average sea temperature in December: 52.1°F

The best month for swimming (with the highest average sea temperature) is July (53.5°F).
The coldest months (with the lowest average sea temperature) are January, February and April (50.8°F).

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Average daylight in December /
Average sunshine in December
Harbor, OR

Average daylight in December / Average sunshine in December - Harbor, OR
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in December: 5h and 0min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

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Average sunshine days in December
Harbor, OR

Average sunshine days in December - Harbor, OR
  • Average sunshine days in December: 12.9 days

The month with the most sunshine days is July (28.3 days).
The month with the least sunshine days is March (11 days).

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Average UV index in December
Harbor, OR

Average UV index in December - Harbor, OR
  • Average UV index in December: 3

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

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Average cloud cover in December
Harbor, OR

Average cloud cover in December - Harbor, OR
  • Average cloud cover in December: 47

The months with the most cloud cover are January and March (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 9).

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Average visibility in December
Harbor, OR

Average visibility in December - Harbor, OR
  • 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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Harbor, Oregon, USA

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