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

These large silos and creatively shaped red barns stand in the middle of a vast field of harvested wheat, in Pendleton, Oregon

Weather in December

December brings winter back to Pendleton in full force. Cold conditions persist, with an average temperature drop to 27.3°F (-2.6°C), the lowest of the year, and an increase in snowfall to 2.05" (52mm). Despite the high relative humidity at 78% and shorter daylight hours, the festive season brings a unique warmth to the month. It's also the best time for snow sports enthusiasts who eagerly anticipate the snowy conditions. Equally important is to ensure good visibility during this period for safe driving.

Temperature

December, marked by an average high-temperature of 37.9°F (3.3°C) and a low-temperature of 27.3°F (-2.6°C), is the coldest month.

Humidity

In December, the average relative humidity is 78%.

Rainfall

In December, the rain falls for 13.5 days. Throughout December, 1.57" (40mm) of precipitation is accumulated. Throughout the year, there are 132.7 rainfall days, and 12.91" (328mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, September, November and December. In Pendleton, in December, during 5.5 snowfall days, 2.05" (52mm) of snow is typically accumulated. Throughout the year, there are 17.5 snowfall days, and 9.41" (239mm) 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, sunrise is at 7:16 am and sunset at 4:12 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:21 pm PST.

Sunshine

January and December, with an average of 5.4h of sunshine, are months with the least sunshine.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.
Note: In December, the maximum UV index of 2 suggests this advice:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. 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. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.

Updated: Jun 4, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month?

With average temperatures fluctuating between a high of 37.9°F (3.3°C) and a low of 27.3°F (-2.6°C), December stands out as the coldest month.

Is December cold?

During December, Pendleton experiences an average high-temperature of 37.9°F (3.3°C) and a low-temperature of 27.3°F (-2.6°C).

What is the average humidity in December?

In Pendleton, the average relative humidity in December is 78%.

How many days does it rain in December?

In December, the rain falls for 13.5 days. Throughout December, 1.57" (40mm) of precipitation is accumulated.

How much does it snow in December?

In Pendleton, in December, during 5.5 snowfall days, 2.05" (52mm) of snow is typically accumulated.

What is the month with the shortest days?

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

How many hours of daylight does Pendleton have in December?

In December, the average day length is 8h and 46min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:16 am and sunset at 4:12 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:21 pm PST.

What are the months with the least sunshine?

January and December, with an average of 5.4h of sunshine, are months with the least sunshine in Pendleton.

How long on average sun shines in December in Pendleton?

In December, the average sunshine duration is 5.4h.

What are the months with the lowest UV index?

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

What is the UV index reading in December?

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

47.3°F 8.5°C

37.9°F 3.3°C

39.7°F 4.3°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

7.6mph 12.2km/h

7.1mph 11.4km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

14.9

13.8

14.3

Average UV index

Average cloud cover

36%

43%

Average visibility

6mi 9.7km

Average temperature in December
Pendleton, OR

Average high temperature in December: 37.9°F

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is December (37.9°F).

Average low temperature in December: 27.3°F

The month with the highest average low temperature is August (61.7°F).
The coldest month (with the lowest average low temperature) is December (27.3°F).

Average pressure in December
Pendleton, OR

Average pressure in December: 30.17"Hg

The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).

Average wind speed in December
Pendleton, OR

Average wind speed in December: 6.5mph

The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is September (6.2mph).

Average humidity in December
Pendleton, OR

Average humidity in December: 78%

The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (38%).

Average rainfall in December
Pendleton, OR

Average rainfall in December: 1.57"

The wettest month (with the highest rainfall) is March (1.65").
The driest month (with the least rainfall) is July (0.24").

Average rainfall days in December
Pendleton, OR

Average rainfall days in December: 13.5 days

The month with the highest number of rainy days is March (17.1 days).
The month with the least rainy days is August (3.6 days).

Average snowfall in December
Pendleton, OR

Average snowfall in December: 2.05"

The month with the highest snowfall is February (3.62").
The months with the least snowfall are May, June, July, August and October (0").

Average snowfall days in December
Pendleton, OR

Average snowfall days in December: 5.5 days

The month with the highest number of snowfall days is December (5.5 days).
The months with the least snowfall days are May, June, July, August and October (0 days).

Average daylight in December /
Average sunshine in December
Pendleton, 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: 5h and 2min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).

Average sunshine days in December
Pendleton, OR

Average sunshine days in December: 13.8 days

The month with the most sunshine days is July (24.4 days).
The month with the least sunshine days is March (11.7 days).

Average UV index in December
Pendleton, OR

Average UV index in December: 2

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in December
Pendleton, OR

Average cloud cover in December: 43

The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 9).

Average visibility in December
Pendleton, OR

Average visibility in December: 6mi

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

December weather forecast
Pendleton, OR

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