December weather - Winter 2023

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

An evening shot of the leafy town of Salem in Oregon

Weather in December

Finally, December homes the celebrations of Winter in Salem with the coldest weather throughout the year. The city sees a higher level of rainfall at 3.94", defining the mood of December. The feature of December's weather is a moderate snowfall around 0.35", which visually aligns with the celebratory holiday season. December stands as a festive and joyous period in Salem, complementing the winter charm.

Temperature

The coldest period in Salem is December, when temperatures fluctuate between an average high of 45.5°F and a low of 34.5°F.

Humidity

The months with the highest humidity in Salem are January, February and December, with an average relative humidity of 86%.

Rainfall

December is the month with the most rainfall. Rain falls for 18.3 days and accumulates 3.94" of precipitation.

Snowfall

January through March, November and December are months with snowfall. In December, in Salem, Oregon, it is snowing for 0.6 days. Throughout December, 0.35" of snow is accumulated. Throughout the year, in Salem, there are 4.7 snowfall days, and 2.48" of snow is accumulated.

Daylight

The month with the shortest days in Salem is December, with an average of 8h and 48min of daylight.
On the first day of December in Salem, sunrise is at 7:29 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:50 am and sunset at 4:40 pm PST.

Sunshine

The average sunshine in December is 4.3h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Salem. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the average person.
Note: An average UV index of 2 in December transforms into this advice:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. To avoid the Sun's strongest rays, limit exposure around the mid-day period. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.

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FAQ

What part of the year is the coldest in Salem?

December, with its average high-temperature of 45.5°F and an average low-temperature of 34.5°F, holds the record as the coldest month.

What is the temperature in December in Salem?

The average high-temperature and low-temperature in Salem, Oregon, during December are 45.5°F and 34.5°F respectively. The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in August is computed to be 86°F.

What are the most humid months in Salem?

The months with the highest humidity in Salem are January, February and December, with an average relative humidity of 86%.

What is the average humidity in December in Salem?

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

What is the wettest month in Salem?

December is the month with the most rainfall in Salem, Oregon. Rain falls for 18.3 days and accumulates 3.94" of precipitation.

How many days does it rain in December in Salem?

In Salem, in December, during 18.3 rainfall days, 3.94" of precipitation is typically accumulated.

How many days does it snow in December in Salem?

In Salem, Oregon, in December, during 0.6 snowfall days, 0.35" of snow is typically accumulated.

What is the month with the shortest days in Salem?

December has the shortest days of the year in Salem, Oregon, with an average of 8h and 48min of daylight.

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

The average day length in December is 8h and 51min.

When are sunrise and sunset in December in Salem?

On the first day of December in Salem, sunrise is at 7:29 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:50 am and sunset at 4:40 pm PST.

How long on average sun shines in December in Salem?

In Salem, Oregon, the average sunshine duration in December is 4.3h.

What are the months with the lowest UV index in Salem?

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

How high is the UV index in December in Salem?

The average daily maximum UV index in December in Salem is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to 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

51.8°F

45.5°F

47.7°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

6mph

5.8mph

6mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

11.3

10.6

12.4

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Salem, OR

Average high temperature in December: 45.5°F

The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (45.5°F).

Average low temperature in December: 34.5°F

The month with the highest average low temperature is August (54.1°F).
The coldest month (with the lowest average low temperature) is December (34.5°F).

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Average pressure in December
Salem, 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
Salem, OR

Average wind speed in December: 5.3mph

The windiest months (with the highest average wind speed) are January, March and November (5.5mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).

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Average humidity in December
Salem, OR

Average humidity in December: 86%

The months with the highest relative humidity are January, February and December (86%).
The month with the lowest relative humidity is August (65%).

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Average rainfall in December
Salem, OR

Average rainfall in December: 3.94"

The wettest month (with the highest rainfall) is December (3.94").
The driest month (with the least rainfall) is July (0.28").

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Average rainfall days in December
Salem, OR

Average rainfall days in December: 18.3 days

The month with the highest number of rainy days is March (19.6 days).
The month with the least rainy days is July (3.9 days).

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Average snowfall in December
Salem, OR

Average snowfall in December: 0.35"

The month with the highest snowfall is February (1.18").
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
Salem, OR

Average snowfall days in December: 0.6 days

The month with the highest number of snowfall days is February (1.8 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
Salem, 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 2min

The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).

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Average sunshine days in December
Salem, OR

Average sunshine days in December: 10.6 days

The month with the most sunshine days is July (26.3 days).
The month with the least sunshine days is March (8.8 days).

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Average UV index in December
Salem, 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
Salem, OR

Average cloud cover in December: 56

The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 21).

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Average visibility in December
Salem, 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
Salem, OR

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