December weather forecast
The Dalles, OR

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Weather in December

In December, the Dalles transitions into the heart of winter. The highest snowfall post-Febrauary occurs in December, accumulating to approximately 2.99" (76mm) across 4.4 days. The increasing chill in the air indicates the approach of the Christmas season, transforming the city into a festive fairyland. Although the weather might be cold, the innate warmth of the city and its inhabitants, coupled with the festive cheer, leaves an indelible mark on visitors and residents alike.

Temperature

The month of December, characterized by an average high of 37°F (2.8°C) and a low of 27.1°F (-2.7°C), is recognized as the coldest in The Dalles.

Humidity

The months with the highest humidity are January and December, with an average relative humidity of 85%.

Rainfall

In The Dalles, in December, during 15.5 rainfall days, 2.87" (73mm) of precipitation is typically accumulated. Throughout the year, in The Dalles, there are 133.5 rainfall days, and 16.93" (430mm) of precipitation is accumulated.

Snowfall

Months with snowfall in The Dalles, Oregon, are January through March, November and December. In The Dalles, in December, during 4.4 snowfall days, 2.99" (76mm) of snow is typically accumulated. Throughout the year, in The Dalles, there are 14.3 snowfall days, and 11.06" (281mm) of snow is accumulated.

Daylight

The month with the shortest days in The Dalles, Oregon, is December, with an average of 8h and 48min of daylight.
On the first day of the month, sunrise is at 7:25 am and sunset at 4:22 pm. On the last day of December, sunrise is at 7:45 am and sunset at 4:31 pm PST.

Sunshine

The average sunshine in December in The Dalles is 5h.

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 reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, the UV index of 2 transforms into the following advice:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Around midday, solar radiation is most harmful; hence, exposure should be limited. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
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Frequently asked questions

What part of the year is the coldest in The Dalles?

December, with its high-temperature average of 37°F (2.8°C) and a low-temperature average of 27.1°F (-2.7°C), is the coldest month in The Dalles, Oregon.

How cold is December in The Dalles?

An average high-temperature, in December, in The Dalles, is 37°F (2.8°C) and the average low-temperature is 27.1°F (-2.7°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, in August is estimated at 82.4°F (28°C).

What are the most humid months in The Dalles?

January and December, with an average relative humidity of 85%, are most humid months in The Dalles.

What is the average humidity in December in The Dalles?

In December, the average relative humidity in The Dalles is 85%.

How many days does it rain in December in The Dalles?

In The Dalles, in December, during 15.5 rainfall days, 2.87" (73mm) of precipitation is typically accumulated.

How many days does it snow in December in The Dalles?

In The Dalles, Oregon, in December, snow falls for 4.4 days, with typically accumulated 2.99" (76mm) of snow.

What is the month with the shortest days in The Dalles?

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

How many hours of daylight does The Dalles have in December?

In December, the average day length in The Dalles, Oregon, is 8h and 46min.

When is the sunrise / sunset in December in The Dalles?

In December, on the first day of the month, sunrise is at 7:25 am and sunset at 4:22 pm. On the last day of the month, in The Dalles, sunrise is at 7:45 am and sunset at 4:31 pm PST.

How long on average sun shines in December in The Dalles?

In The Dalles, the average sunshine duration in December is 5h.

When is the lowest UV index in The Dalles?

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

How high is the UV index in December in The Dalles?

In December, the average daily maximum UV index in The Dalles, Oregon, is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from unprotected exposure to UV radiation.
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
The Dalles, OR

Average temperature in December - The Dalles, OR
  • Average high temperature in December: 37°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (37°F).

  • Average low temperature in December: 27.1°F

The month with the highest average low temperature is August (55.8°F).
The coldest month (with the lowest average low temperature) is December (27.1°F).

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Average pressure in December
The Dalles, OR

Average pressure in December - The Dalles, OR
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.96"Hg).

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Average wind speed in December
The Dalles, OR

Average wind speed in December - The Dalles, OR
  • Average wind speed in December: 4.8mph

The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest months (with the lowest average wind speed) are January and December (4.8mph).

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Average humidity in December
The Dalles, OR

Average humidity in December - The Dalles, OR
  • Average humidity in December: 85%

The months with the highest relative humidity are January and December (85%).
The months with the lowest relative humidity are July and August (51%).

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Average rainfall in December
The Dalles, OR

Average rainfall in December - The Dalles, OR
  • Average rainfall in December: 2.87"

The wettest month (with the highest rainfall) is January (2.99").
The driest month (with the least rainfall) is July (0.16").

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Average rainfall days in December
The Dalles, OR

Average rainfall days in December - The Dalles, OR
  • Average rainfall days in December: 15.5 days

The month with the highest number of rainy days is March (16.3 days).
The month with the least rainy days is August (3.2 days).

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Average snowfall in December
The Dalles, OR

Average snowfall in December - The Dalles, OR
  • Average snowfall in December: 2.99"

The month with the highest snowfall is February (4.29").
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
The Dalles, OR

Average snowfall days in December - The Dalles, OR
  • Average snowfall days in December: 4.4 days

The month with the highest number of snowfall days is December (4.4 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
The Dalles, OR

Average daylight in December / Average sunshine in December - The Dalles, 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 0min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).

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Average sunshine days in December
The Dalles, OR

Average sunshine days in December - The Dalles, OR
  • Average sunshine days in December: 12.1 days

The month with the most sunshine days is July (26.8 days).
The month with the least sunshine days is March (10.6 days).

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Average UV index in December
The Dalles, OR

Average UV index in December - The Dalles, 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
The Dalles, OR

Average cloud cover in December - The Dalles, OR
  • Average cloud cover in December: 49

The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 10).

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Average visibility in December
The Dalles, OR

Average visibility in December - The Dalles, OR
  • Average visibility in December: 5mi

The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).

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The Dalles, Oregon, USA

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