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

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" (100mm), defining the mood of December. The feature of December's weather is a moderate snowfall around 0.35" (9mm), which visually aligns with the celebratory holiday season. December stands as a festive and joyous period in Salem, complementing the winter charm.

Temperature

The lowest temperatures in Salem are recorded in December, with averages reaching a high of 45.5°F (7.5°C) and a low of 34.5°F (1.4°C).

Humidity

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

Rainfall

The month with the most rainfall in Salem is December, when the rain falls for 18.3 days and typically aggregates up to 3.94" (100mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall. In Salem, in December, snow falls for 0.6 days, with typically accumulated 0.35" (9mm) of snow. Throughout the year, there are 4.7 snowfall days, and 2.48" (63mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Salem, with an average of 8h and 48min of daylight.
On the first day of the month, sunrise is at 7:30 am and sunset at 4:32 pm. On the last day of December, sunrise is at 7:50 am and sunset at 4:40 pm PST.

Sunshine

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

UV index

The months with the lowest UV index in Salem 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 radiation for average individuals.
Note: The daily high UV index of 2 during December translates into the following recommendations:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.

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Frequently asked questions

What is the coldest time of year in Salem?

The coldest period in Salem, Oregon, tends to be December, when average temperatures fluctuate between a high of 45.5°F (7.5°C) and a low of 34.5°F (1.4°C).

What are December temperatures in Salem?

In Salem, 45.5°F (7.5°C) is the average high-temperature and 34.5°F (1.4°C) is the average low-temperature during December. In August, the average heat index (a.k.a. 'feels like', 'real feel'), which factors the actual air temperature with the relative humidity, is calculated to be 86°F (30°C).

What are the most humid months in Salem?

January, February and December, with an average relative humidity of 86%, are most humid months in Salem.

What is the average humidity in December in Salem?

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

What is the wettest month in Salem?

The month with the most rainfall is December, when the rain falls for 18.3 days and typically aggregates up to 3.94" (100mm) of precipitation.

How much does it rain in Salem in December?

In Salem, Oregon, in December, it is raining for 18.3 days, with typically 3.94" (100mm) of accumulated precipitation.

How many days does it snow in December in Salem?

In December, in Salem, Oregon, it is snowing for 0.6 days. Throughout December, 0.35" (9mm) of snow is accumulated.

What is the month with the shortest days in Salem?

The month with the shortest days is December, with an average of 8h and 48min of daylight.

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

In December, the average day length in Salem, Oregon, is 8h and 51min.

When is the sunrise / sunset in December in Salem?

In December, on the first day of the month, sunrise is at 7:30 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, the average sunshine duration in December is 4.3h.

What is the month 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.

What is the UV index reading in December in Salem?

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

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 11°C

45.5°F 7.5°C

47.7°F 8.7°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

6mph 9.7km/h

5.8mph 9.3km/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

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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