December weather forecast
West Slope, OR

Weather in December

December, the first month of the winter in West Slope, is also a frosty month, with temperature in the range of an average high of 44.2°F (6.8°C) and an average low of 34.7°F (1.5°C).

Temperature

The coldest month is December, with an average high-temperature of 44.2°F (6.8°C) and an average low-temperature of 34.7°F (1.5°C).

Humidity

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

Rainfall

December is the month with the most rainfall in West Slope, Oregon. 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 West Slope, 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

December has the shortest days of the year in West Slope, Oregon, with an average of 8h and 47min of daylight.
On the first day of December in West Slope, 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 4:37 pm PST.

Sunshine

In December, the average sunshine is 4.1h.

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 of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The average daily UV index of 2 in December transform into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in West Slope?

With an average high-temperature of 44.2°F (6.8°C) and an average low-temperature of 34.7°F (1.5°C), December is the coldest month in West Slope.

What are the most humid months in West Slope?

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

What is the average humidity in December in West Slope?

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

What is the wettest month in West Slope?

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

How much does it rain in West Slope in December?

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

How much does it snow in West Slope in December?

In December, in West Slope, it is snowing for 0.8 days. Throughout December, 0.43" (11mm) of snow is accumulated.

What is the month with the shortest days in West Slope?

The month with the shortest days is December, with an average of 8h and 47min of daylight.

How many hours of daylight does West Slope have in December?

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

When are sunrise and sunset in December in West Slope?

On the first day of December in West Slope, 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 4:37 pm PST.

How many hours of sunshine does West Slope have in December?

In December, the average sunshine duration is 4.1h.

What are the months with the lowest UV index in West Slope?

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

What is the UV index intensity in December in West Slope?

In West Slope, Oregon, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to Sun's UV rays.
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
West Slope, OR

Average temperature in December - West Slope, 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
West Slope, OR

Average pressure in December - West Slope, 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
West Slope, OR

Average wind speed in December - West Slope, 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
West Slope, OR

Average humidity in December - West Slope, 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
West Slope, OR

Average rainfall in December - West Slope, 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
West Slope, OR

Average rainfall days in December - West Slope, 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
West Slope, OR

Average snowfall in December - West Slope, 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
West Slope, OR

Average snowfall days in December - West Slope, 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
West Slope, OR

Average daylight in December / Average sunshine in December - West Slope, OR
  • Average daylight in December: 8h and 47min

The month with the longest days is June (Average daylight: 15h and 37min).
The month with the shortest days is December (Average daylight: 8h and 47min).

  • Average sunshine in December: 4h and 6min

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
West Slope, OR

Average sunshine days in December - West Slope, 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
West Slope, OR

Average UV index in December - West Slope, 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
West Slope, OR

Average cloud cover in December - West Slope, 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
West Slope, OR

Average visibility in December - West Slope, 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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