December weather forecast
Cannon Beach, OR

Weather in December

December, the first month of the winter in Cannon Beach, is also a frosty month, with temperature in the range of an average low of 40.5°F (4.7°C) and an average high of 46.6°F (8.1°C).

Temperature

The coldest month is December, with an average high-temperature of 46.6°F (8.1°C) and an average low-temperature of 40.5°F (4.7°C).

Humidity

The months with the lowest humidity in Cannon Beach are January, March through May, October and December, with an average relative humidity of 81%.

Rainfall

December is the month with the most rainfall in Cannon Beach, Oregon. Rain falls for 20.7 days and accumulates 6.54" (166mm) of precipitation.

Snowfall

January through March and December are months with snowfall. December is the first month it typically snows in Cannon Beach. Throughout December, in the average 0.3 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 2.8 snowfall days, and 1.3" (33mm) of snow is accumulated.

Ocean temperature

In Cannon Beach, the average seawater temperature in December is 50°F (10°C).
Note: Swimming in 50°F (10°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.

Daylight

December has the shortest days of the year, with an average of 8h and 44min of daylight.
On the first day of the month, sunrise is at 7:37 am and sunset at 4:32 pm. On the last day of December, in Cannon Beach, sunrise is at 7:57 am and sunset at 4:40 pm PST.

Sunshine

The average sunshine in December is 4.2h.

UV index

February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Cannon Beach. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Cannon Beach?

The coldest month in Cannon Beach is December, with an average high-temperature of 46.6°F (8.1°C) and an average low-temperature of 40.5°F (4.7°C).

What is the temperature in December in Cannon Beach?

In Cannon Beach, in December, the average high-temperature is 46.6°F (8.1°C), and the average low-temperature is 40.5°F (4.7°C).

What are the least humid months in Cannon Beach?

January, March through May, October and December, with an average relative humidity of 81%, are the least humid months.

What is the average humidity in December in Cannon Beach?

In December, the average relative humidity in Cannon Beach is 81%.

What is the wettest month in Cannon Beach?

The month with the most rainfall in Cannon Beach, Oregon, is December, when the rain falls for 20.7 days and typically aggregates up to 6.54" (166mm) of precipitation.

How many days does it rain in December in Cannon Beach?

In Cannon Beach, in December, it is raining for 20.7 days, with typically 6.54" (166mm) of accumulated precipitation.

When does it start to snow in Cannon Beach?

December is the first month it typically snows in Cannon Beach. Throughout December, in the average 0.3 snowfall days, it receives 0.04" (1mm) of snow.

What is the water temperature in December in Cannon Beach?

In December, the average ocean temperature is 50°F (10°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 Cannon Beach?

December has the shortest days of the year, with an average of 8h and 44min of daylight.

How many hours of daylight does Cannon Beach have in December?

In Cannon Beach, Oregon, the average day length in December is 8h and 44min.

When are sunrise and sunset in December in Cannon Beach?

On the first day of December, sunrise is at 7:37 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:57 am and sunset at 4:40 pm PST.

How many hours of sunshine does Cannon Beach have in December?

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

What are the months with the lowest UV index in Cannon Beach?

February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Cannon Beach.

What is the UV index intensity in December in Cannon Beach?

In Cannon Beach, Oregon, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health risk 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
Cannon Beach, OR

Average temperature in December - Cannon Beach, OR
  • Average high temperature in December: 46.6°F

The warmest month (with the highest average high temperature) is August (65.5°F).
The month with the lowest average high temperature is December (46.6°F).

  • Average low temperature in December: 40.5°F

The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (40.5°F).

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Average pressure in December
Cannon Beach, OR

Average pressure in December - Cannon Beach, OR
  • 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 (30.02"Hg).

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Average wind speed in December
Cannon Beach, OR

Average wind speed in December - Cannon Beach, OR
  • Average wind speed in December: 10.5mph

The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

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Average humidity in December
Cannon Beach, OR

Average humidity in December - Cannon Beach, OR
  • Average humidity in December: 81%

The month with the highest relative humidity is August (84%).
The months with the lowest relative humidity are January, March, April, May, October and December (81%).

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Average rainfall in December
Cannon Beach, OR

Average rainfall in December - Cannon Beach, OR
  • Average rainfall in December: 6.54"

The wettest month (with the highest rainfall) is December (6.54").
The driest months (with the least rainfall) are July and August (0.47").

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Average rainfall days in December
Cannon Beach, OR

Average rainfall days in December - Cannon Beach, OR
  • Average rainfall days in December: 20.7 days

The month with the highest number of rainy days is March (20.8 days).
The months with the least rainy days are July and August (7.3 days).

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Average snowfall in December
Cannon Beach, OR

Average snowfall in December - Cannon Beach, OR
  • Average snowfall in December: 0.04"

The month with the highest snowfall is February (0.59").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days in December
Cannon Beach, OR

Average snowfall days in December - Cannon Beach, OR
  • Average snowfall days in December: 0.3 days

The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average sea temperature in December
Cannon Beach, OR

Average sea temperature in December - Cannon Beach, OR
  • Average sea temperature in December: 49.9°F

The best month for swimming (with the highest average sea temperature) is July (57.2°F).
The coldest month (with the lowest average sea temperature) is February (48.1°F).

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Average daylight in December /
Average sunshine in December
Cannon Beach, OR

Average daylight in December / Average sunshine in December - Cannon Beach, OR
  • Average daylight in December: 8h and 44min

The month with the longest days is June (Average daylight: 15h and 41min).
The month with the shortest days is December (Average daylight: 8h and 44min).

  • Average sunshine in December: 4h and 12min

The month with the most sunshine is August (Average sunshine: 10h and 0min).
The months with the least sunshine are January and February (Average sunshine: 3h and 54min).

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Average sunshine days in December
Cannon Beach, OR

Average sunshine days in December - Cannon Beach, OR
  • Average sunshine days in December: 8.8 days

The month with the most sunshine days is August (21.2 days).
The month with the least sunshine days is February (7.5 days).

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Average UV index in December
Cannon Beach, OR

Average UV index in December - Cannon Beach, OR
  • Average UV index in December: 2

The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are February, November and December (UV index 2).

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Average cloud cover in December
Cannon Beach, OR

Average cloud cover in December - Cannon Beach, OR
  • Average cloud cover in December: 56

The months with the most cloud cover are January and February (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 35).

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Average visibility in December
Cannon Beach, OR

Average visibility in December - Cannon Beach, OR
  • Average visibility in December: 6mi

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

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