December weather forecast
Scappoose, OR

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Weather in December

December, the first month of the winter in Scappoose, is still a chilly month, with an average temperature ranging between max 42.8°F (6°C) and min 33.1°F (0.6°C).

Temperature

December, characterized by an average high temperature of 42.8°F (6°C) and a low temperature of 33.1°F (0.6°C), is generally the coldest month.

Humidity

In Scappoose, the average relative humidity in December is 86%.

Rainfall

In Scappoose, during December, the rain falls for 20.3 days and regularly aggregates up to 5.08" (129mm) of precipitation. Throughout the year, in Scappoose, there are 181.3 rainfall days, and 35.55" (903mm) of precipitation is accumulated.

Snowfall

January through March, November and December are months with snowfall. In December, it is snowing for 0.7 days. Throughout December, 0.24" (6mm) of snow is accumulated. Throughout the year, there are 6.7 snowfall days, and 4.45" (113mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Scappoose, with an average of 8h and 42min of daylight.
On the first day of the month, sunrise is at 7:32 am and sunset at 4:28 pm. On the last day of December, sunrise is at 7:52 am and sunset at 4:37 pm PST.

Sunshine

In Scappoose, the average sunshine in December is 3.9h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the average person.
Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
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Frequently asked questions

What is the coldest month in Scappoose?

In Scappoose, Oregon, the average lowest temperatures are observed in December, with a high of 42.8°F (6°C) and a low of 33.1°F (0.6°C).

Is December cold in Scappoose?

The average high-temperature and low-temperature during December are 42.8°F (6°C) and 33.1°F (0.6°C) respectively.

What is the average humidity in December in Scappoose?

The average relative humidity in December in Scappoose, Oregon, is 86%.

How much does it rain in Scappoose in December?

In Scappoose, during December, the rain falls for 20.3 days and regularly aggregates up to 5.08" (129mm) of precipitation.

How much does it snow in Scappoose in December?

In Scappoose, Oregon, in December, snow falls for 0.7 days, with typically accumulated 0.24" (6mm) of snow.

What is the month with the shortest days in Scappoose?

With an average of 8h and 42min of daylight, December has the shortest days of the year in Scappoose.

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

In Scappoose, Oregon, the average day length in December is 8h and 45min.

What time are sunrise and sunset in December in Scappoose?

In December, on the first day of the month, sunrise is at 7:32 am and sunset at 4:28 pm. On the last day of the month, in Scappoose, sunrise is at 7:52 am and sunset at 4:37 pm PST.

How long on average sun shines in December in Scappoose?

In December, the average sunshine duration in Scappoose, Oregon, is 3.9h.

When is the lowest UV index in Scappoose?

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

What is the UV index reading in December in Scappoose?

The average daily maximum UV index in December in Scappoose, Oregon, is 2. A UV Index reading of 2, and below, represents 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
Scappoose, OR

Average temperature in December - Scappoose, OR
  • Average high temperature in December: 42.8°F

The warmest month (with the highest average high temperature) is August (79.7°F).
The month with the lowest average high temperature is December (42.8°F).

  • Average low temperature in December: 33.1°F

The month with the highest average low temperature is August (52.9°F).
The coldest month (with the lowest average low temperature) is December (33.1°F).

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Average pressure in December
Scappoose, OR

Average pressure in December - Scappoose, OR
  • Average pressure in December: 30.09"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).

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Average wind speed in December
Scappoose, OR

Average wind speed in December - Scappoose, OR
  • Average wind speed in December: 4.6mph

The windiest month (with the highest average wind speed) is March (4.8mph).
The calmest month (with the lowest average wind speed) is September (4mph).

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Average humidity in December
Scappoose, OR

Average humidity in December - Scappoose, OR
  • Average humidity in December: 86%

The months with the highest relative humidity are February and November (87%).
The months with the lowest relative humidity are July and August (69%).

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Average rainfall in December
Scappoose, OR

Average rainfall in December - Scappoose, OR
  • Average rainfall in December: 5.08"

The wettest month (with the highest rainfall) is January (5.24").
The driest month (with the least rainfall) is August (0.43").

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Average rainfall days in December
Scappoose, OR

Average rainfall days in December - Scappoose, OR
  • Average rainfall days in December: 20.3 days

The month with the highest number of rainy days is March (21.1 days).
The months with the least rainy days are July and August (5.5 days).

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Average snowfall in December
Scappoose, OR

Average snowfall in December - Scappoose, OR
  • Average snowfall in December: 0.24"

The month with the highest snowfall is February (1.77").
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
Scappoose, OR

Average snowfall days in December - Scappoose, OR
  • Average snowfall days in December: 0.7 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
Scappoose, OR

Average daylight in December / Average sunshine in December - Scappoose, OR
  • Average daylight in December: 8h and 4min

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

  • Average sunshine in December: 3h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are January and February (Average sunshine: 3h and 48min).

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Average sunshine days in December
Scappoose, OR

Average sunshine days in December - Scappoose, OR
  • Average sunshine days in December: 9.2 days

The month with the most sunshine days is July (23.2 days).
The month with the least sunshine days is February (7.8 days).

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Average UV index in December
Scappoose, OR

Average UV index in December - Scappoose, OR
  • 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
Scappoose, OR

Average cloud cover in December - Scappoose, OR
  • Average cloud cover in December: 60

The month with the most cloud cover is February (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in December
Scappoose, OR

Average visibility in December - Scappoose, OR
  • Average visibility in December: 4mi

The month with the highest visibility is August (6mi).
The months with the lowest visibility are January, February, March, November and December (4mi).

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Scappoose, Oregon, USA

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