December weather - Winter 2024

Weather in December
Frequently asked questions
Average temperature in December
Average pressure in December
Average wind speed in December
Average humidity in December
Average rainfall in December
Average rainfall days in December
Average snowfall in December
Average snowfall days in December
Average daylight in December
Average sunshine in December
Average sunshine days in December
Average UV index in December
Average cloud cover in December
Average visibility in December

Colored yellow, brown and golden tree colors under a perfect blue, cloudy sky in the fall, mirrored in the calm lake water in Beaverton, Oregon

Weather in December

December announces the arrival of winter with a significant drop in average temperatures, down to 34.7°F (1.5°C). The city experiences the highest precipitation of the year, at 4.61" (117mm), carrying a hint of snow. The long nights curtailing daylight to a mere 8.8 hours, matched with 58% cloud cover, adds to the winter ambiance. Owing to the weather, Beaverton in December wraps itself in festive spirit under a chilly blanket.

Temperature

Beaverton notes the coldest temperatures in December, with a high average of 44.2°F (6.8°C) and a low of 34.7°F (1.5°C).

Humidity

The months with the highest humidity are February and December, with an average relative humidity of 84%.

Rainfall

December is the month with the most rainfall. Rain falls for 18.7 days and accumulates 4.61" (117mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall. In December, in Beaverton, Oregon, it is snowing for 0.8 days. Throughout December, 0.43" (11mm) of snow is accumulated. Throughout the year, there are 6.1 snowfall days, and 4.37" (111mm) of snow is accumulated.

Daylight

With an average of 8h and 48min of daylight, December has the shortest days of the year.
On the first day of December in Beaverton, sunrise is at 7:31 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:51 am and sunset at 4:38 pm PST.

Sunshine

The average sunshine in December is 4.1h.

UV index

The months with the lowest UV index in Beaverton are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high UV index of 2 in December translates into the following recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. 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. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.

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Frequently asked questions

What are the coldest months in Beaverton?

In Beaverton, Oregon, the average lowest temperatures are observed in December, with a high of 44.2°F (6.8°C) and a low of 34.7°F (1.5°C).

Is December cold in Beaverton?

An average high-temperature, in December, in Beaverton, is 44.2°F (6.8°C) and the average low-temperature is 34.7°F (1.5°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, is computed to be 84.2°F (29°C).

What is the most humid month in Beaverton?

February and December, with an average relative humidity of 84%, are most humid months.

What is the average humidity in December in Beaverton?

In Beaverton, the average relative humidity in December is 84%.

What is the wettest month in Beaverton?

December is the month with the most rainfall in Beaverton. Rain falls for 18.7 days and accumulates 4.61" (117mm) of precipitation.

How many days does it rain in December in Beaverton?

In December, in Beaverton, Oregon, the rain falls for 18.7 days. Throughout December, 4.61" (117mm) of precipitation is accumulated.

How much does it snow in Beaverton in December?

In Beaverton, Oregon, in December, snow falls for 0.8 days, with typically accumulated 0.43" (11mm) of snow.

What is the month with the shortest days in Beaverton?

With an average of 8h and 48min of daylight, December has the shortest days of the year in Beaverton.

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

In Beaverton, the average day length in December is 8h and 47min.

When are sunrise and sunset in December in Beaverton?

In December, on the first day of the month, sunrise is at 7:31 am and sunset at 4:29 pm. On the last day of the month, in Beaverton, Oregon, sunrise is at 7:51 am and sunset at 4:38 pm PST.

How many hours of sunshine does Beaverton have in December?

In Beaverton, the average sunshine duration in December is 4.1h.

What is the month with the lowest UV index in Beaverton?

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

How high is the UV index in December in Beaverton?

The average daily maximum UV index in December in Beaverton is 2. A UV Index of 2, and less, symbolizes a low health threat from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

50.9°F 10.5°C

44.2°F 6.8°C

46°F 7.8°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

5.7mph 9.2km/h

5.6mph 9km/h

6mph 9.7km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

10.4

10.3

Average UV index

Average cloud cover

56%

58%

Average visibility

5mi 8km

Average temperature in December
Beaverton, OR

Average high temperature in December: 44.2°F

The warmest month (with the highest average high temperature) is August (81.7°F).
The month with the lowest average high temperature is December (44.2°F).

Average low temperature in December: 34.7°F

The month with the highest average low temperature is August (55.6°F).
The coldest month (with the lowest average low temperature) is December (34.7°F).

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Average pressure in December
Beaverton, OR

Average pressure in December: 30.1"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
Beaverton, OR

Average wind speed in December: 5.2mph

The windiest month (with the highest average wind speed) is January (5.4mph).
The calmest month (with the lowest average wind speed) is August (4mph).

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Average humidity in December
Beaverton, OR

Average humidity in December: 84%

The months with the highest relative humidity are February and December (84%).
The month with the lowest relative humidity is August (63%).

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Average rainfall in December
Beaverton, OR

Average rainfall in December: 4.61"

The wettest month (with the highest rainfall) is December (4.61").
The driest month (with the least rainfall) is July (0.31").

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Average rainfall days in December
Beaverton, OR

Average rainfall days in December: 18.7 days

The month with the highest number of rainy days is March (20.6 days).
The month with the least rainy days is August (4.6 days).

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Average snowfall in December
Beaverton, OR

Average snowfall in December: 0.43"

The month with the highest snowfall is February (1.61").
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
Beaverton, OR

Average snowfall days in December: 0.8 days

The month with the highest number of snowfall days is February (2.2 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
Beaverton, OR

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: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).

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Average sunshine days in December
Beaverton, OR

Average sunshine days in December: 10.3 days

The month with the most sunshine days is July (24.9 days).
The month with the least sunshine days is March (8.6 days).

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Average UV index in December
Beaverton, 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
Beaverton, OR

Average cloud cover in December: 58

The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 23).

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Average visibility in December
Beaverton, OR

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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December weather forecast
Beaverton, OR

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