December weather forecast
Sappho, WA

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Weather in December

The first month of the winter, December, is also a wintry month in Sappho, Washington, with an average temperature ranging between min 36.3°F (2.4°C) and max 42.4°F (5.8°C).

Temperature

The coldest temperatures occur during December, when averages reach a peak of 42.4°F (5.8°C) and a low of 36.3°F (2.4°C).

Humidity

The months with the highest humidity are January and December, with an average relative humidity of 87%.

Rainfall

In Sappho, in December, it is raining for 15.9 days, with typically 3.27" (83mm) of accumulated precipitation. In Sappho, during the entire year, the rain falls for 142.6 days and collects up to 19.61" (498mm) of precipitation.

Snowfall

Months with snowfall in Sappho are January through April, September and December. December is the first month it typically snows in Sappho. Throughout December, in the average 0.8 snowfall days, it receives 0.12" (3mm) of snow. In Sappho, during the entire year, snow falls for 5.1 days and aggregates up to 2.17" (55mm) of snow.

Daylight

The month with the shortest days is December, with an average of 8h and 24min of daylight.
On the first day of the month, sunrise is at 7:47 am and sunset at 4:25 pm. On the last day of December, in Sappho, sunrise is at 8:07 am and sunset at 4:33 pm PST.

Sunshine

The average sunshine in December is 4h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Sappho. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: During December, 2 as the daily maximum UV index converts into the following advice:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
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Frequently asked questions

What is the coldest month in Sappho?

December, known for its average high temperature of 42.4°F (5.8°C) and an average low temperature of 36.3°F (2.4°C), is the coldest month in Sappho.

Is it cold in Sappho during December?

The average high-temperature, in December, in Sappho, is 42.4°F (5.8°C), while the average low-temperature is 36.3°F (2.4°C).

What are the most humid months in Sappho?

The months with the highest humidity in Sappho are January and December, with an average relative humidity of 87%.

What is the average humidity in December in Sappho?

In Sappho, Washington, the average relative humidity in December is 87%.

How many days does it rain in December in Sappho?

In Sappho, during December, the rain falls for 15.9 days and regularly aggregates up to 3.27" (83mm) of precipitation.

When does it start to snow in Sappho?

December is the first month it typically snows in Sappho. Throughout December, in the average 0.8 snowfall days, it receives 0.12" (3mm) of snow.

What is the month with the shortest days in Sappho?

The month with the shortest days is December, with an average of 8h and 24min of daylight.

How many hours of daylight does Sappho have in December?

In December, the average day length in Sappho is 8h and 26min.

When are sunrise and sunset in December in Sappho?

On the first day of December in Sappho, Washington, sunrise is at 7:47 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 8:07 am and sunset at 4:33 pm PST.

How many hours of sunshine does Sappho have in December?

The average sunshine duration in December in Sappho is 4h.

When is the lowest UV index in Sappho?

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

What is the UV index reading in December in Sappho?

The average daily maximum UV index in December in Sappho, Washington, is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from exposure to the Sun's 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
Sappho, WA

Average temperature in December - Sappho, WA
  • Average high temperature in December: 42.4°F

The warmest month (with the highest average high temperature) is August (67.6°F).
The month with the lowest average high temperature is December (42.4°F).

  • Average low temperature in December: 36.3°F

The month with the highest average low temperature is August (50.7°F).
The coldest month (with the lowest average low temperature) is February (36°F).

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Average pressure in December
Sappho, WA

Average pressure in December - Sappho, WA
  • Average pressure in December: 30.03"Hg

The month with the highest atmospheric pressure is July (30.07"Hg).
The month with the lowest atmospheric pressure is March (29.98"Hg).

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Average wind speed in December
Sappho, WA

Average wind speed in December - Sappho, WA
  • Average wind speed in December: 6.6mph

The windiest month (with the highest average wind speed) is January (7.4mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).

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Average humidity in December
Sappho, WA

Average humidity in December - Sappho, WA
  • Average humidity in December: 87%

The months with the highest relative humidity are January and December (87%).
The months with the lowest relative humidity are May, July and August (80%).

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Average rainfall in December
Sappho, WA

Average rainfall in December - Sappho, WA
  • Average rainfall in December: 3.27"

The wettest month (with the highest rainfall) is January (3.66").
The driest month (with the least rainfall) is July (0.28").

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Average rainfall days in December
Sappho, WA

Average rainfall days in December - Sappho, WA
  • Average rainfall days in December: 15.9 days

The month with the highest number of rainy days is November (16.5 days).
The month with the least rainy days is August (5.1 days).

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Average snowfall in December
Sappho, WA

Average snowfall in December - Sappho, WA
  • Average snowfall in December: 0.12"

The month with the highest snowfall is January (1.14").
The months with the least snowfall are May, June, July, August, October and November (0").

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Average snowfall days in December
Sappho, WA

Average snowfall days in December - Sappho, WA
  • Average snowfall days in December: 0.8 days

The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are May, June, July, August and October (0 days).

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Average daylight in December /
Average sunshine in December
Sappho, WA

Average daylight in December / Average sunshine in December - Sappho, WA
  • Average daylight in December: 8h and 2min

The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).

  • Average sunshine in December: 4h and 0min

The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days in December
Sappho, WA

Average sunshine days in December - Sappho, WA
  • Average sunshine days in December: 12.2 days

The month with the most sunshine days is July (23 days).
The month with the least sunshine days is November (11.7 days).

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Average UV index in December
Sappho, WA

Average UV index in December - Sappho, WA
  • Average UV index in December: 2

The months with the highest UV index are June, July and August (UV index 4).
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
Sappho, WA

Average cloud cover in December - Sappho, WA
  • Average cloud cover in December: 58

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in December
Sappho, WA

Average visibility in December - Sappho, WA
  • Average visibility in December: 6mi

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

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Sappho, Washington, USA

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