December weather forecast
Graham, WA

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Weather in December

The first month of the winter, December, is still a chilly month in Graham, Washington, with an average temperature ranging between max 42.8°F (6°C) and min 32.9°F (0.5°C).

Temperature

Graham's December weather reaches an average high of 42.8°F (6°C) and an average low of 32.9°F (0.5°C), making it the coldest month.

Humidity

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

Rainfall

The month with the most rainfall is December, when the rain falls for 18.4 days and typically aggregates up to 4.92" (125mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall in Graham. In Graham, in December, during 1.4 snowfall days, 0.31" (8mm) of snow is typically accumulated. Throughout the year, in Graham, there are 10.3 snowfall days, and 5.94" (151mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 8h and 36min of daylight.
On the first day of December, sunrise is at 7:35 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:55 am and sunset at 4:30 pm PST.

Sunshine

December has the least sunshine of the year in Graham, with an average of 4.1h of sunshine.

UV index

The months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.
Note: In December, the UV index of 2 transforms into the following advice:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Updated: Feb 14, 2024 | Published by: Weather U.S. | Resources

Frequently asked questions

What is the coldest month in Graham?

With an average high-temperature of 42.8°F (6°C) and an average low-temperature of 32.9°F (0.5°C), December is the coldest month in Graham, Washington.

How cold does it get in Graham in December?

An average high-temperature, in December, in Graham, is 42.8°F (6°C) and the average low-temperature is 32.9°F (0.5°C).

What is the most humid month in Graham?

January and December, with an average relative humidity of 87%, are most humid months.

What is the average humidity in December in Graham?

The average relative humidity in December in Graham is 87%.

What is the wettest month in Graham?

December is the month with the most rainfall. Rain falls for 18.4 days and accumulates 4.92" (125mm) of precipitation.

How much does it rain in Graham in December?

In Graham, during December, the rain falls for 18.4 days and regularly aggregates up to 4.92" (125mm) of precipitation.

How much does it snow in Graham in December?

In December, in Graham, it is snowing for 1.4 days. Throughout December, 0.31" (8mm) of snow is accumulated.

What is the month with the shortest days in Graham?

With an average of 8h and 36min of daylight, December has the shortest days of the year in Graham, Washington.

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

The average day length in December in Graham is 8h and 35min.

When are sunrise and sunset in December in Graham?

In December, on the first day of the month, sunrise is at 7:35 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:55 am and sunset at 4:30 pm PST.

What is the month with the least sunshine in Graham?

With an average of 4.1h of sunshine, December has the least sunshine of the year in Graham.

How long on average sun shines in December in Graham?

In December, the average sunshine duration is 4.1h.

What is the month with the lowest UV index in Graham?

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

How high is the UV index in December in Graham?

The average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents 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
Graham, WA

Average temperature in December - Graham, WA
  • Average high temperature in December: 42.8°F

The warmest month (with the highest average high temperature) is August (77.2°F).
The month with the lowest average high temperature is December (42.8°F).

  • Average low temperature in December: 32.9°F

The month with the highest average low temperature is August (51.3°F).
The coldest month (with the lowest average low temperature) is December (32.9°F).

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Average pressure in December
Graham, WA

Average pressure in December - Graham, WA
  • Average pressure in December: 30.09"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).

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Average wind speed in December
Graham, WA

Average wind speed in December - Graham, WA
  • Average wind speed in December: 4.5mph

The windiest months (with the highest average wind speed) are January and March (4.9mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).

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Average humidity in December
Graham, WA

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

The months with the highest relative humidity are January and December (87%).
The month with the lowest relative humidity is July (70%).

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Average rainfall in December
Graham, WA

Average rainfall in December - Graham, WA
  • Average rainfall in December: 4.92"

The wettest month (with the highest rainfall) is December (4.92").
The driest month (with the least rainfall) is July (0.43").

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Average rainfall days in December
Graham, WA

Average rainfall days in December - Graham, WA
  • Average rainfall days in December: 18.4 days

The month with the highest number of rainy days is March (20.2 days).
The month with the least rainy days is August (4.8 days).

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Average snowfall in December
Graham, WA

Average snowfall in December - Graham, WA
  • Average snowfall in December: 0.31"

The month with the highest snowfall is February (2.44").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
Graham, WA

Average snowfall days in December - Graham, WA
  • Average snowfall days in December: 1.4 days

The month with the highest number of snowfall days is February (4.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Graham, WA
  • Average daylight in December: 8h and 4min

The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).

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Average sunshine days in December
Graham, WA

Average sunshine days in December - Graham, WA
  • Average sunshine days in December: 11.1 days

The month with the most sunshine days is August (23.8 days).
The month with the least sunshine days is November (9.3 days).

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Average UV index in December
Graham, WA

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

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).

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Average cloud cover in December
Graham, WA

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

The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in December
Graham, WA

Average visibility in December - Graham, WA
  • Average visibility in December: 5mi

The months with the highest visibility are July and August (6mi).
The months with the lowest visibility are January and February (4mi).

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Graham, Washington, USA

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