December weather forecast
Marysville, WA

Weather in December

December, the first month of the winter in Marysville, is also a wintry month, with an average temperature fluctuating between 42.3°F (5.7°C) and 34.7°F (1.5°C).

Temperature

December is the coldest month, with an average high-temperature of 42.3°F (5.7°C) and an average low-temperature of 34.7°F (1.5°C).

Humidity

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

Rainfall

In Marysville, during December, the rain falls for 19.3 days and regularly aggregates up to 3.82" (97mm) of precipitation. Throughout the year, there are 179.1 rainfall days, and 29.57" (751mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December. In Marysville, during December, snow falls for 1.5 days and regularly aggregates up to 0.51" (13mm) of snow. In Marysville, during the entire year, snow falls for 8.9 days and aggregates up to 6.1" (155mm) of snow.

Daylight

The month with the shortest days is December, with an average of 8h and 27min of daylight.
On the first day of December in Marysville, sunrise is at 7:37 am and sunset at 4:17 pm. On the last day of the month, sunrise is at 7:58 am and sunset at 4:24 pm PST.

Sunshine

The months with the least sunshine in Marysville are January and December, with an average of 4.2h of sunshine.

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 unsafe exposure to UV radiation for average individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in Marysville?

The coldest month is December, with an average high-temperature of 42.3°F (5.7°C) and an average low-temperature of 34.7°F (1.5°C).

What is the temperature in December in Marysville?

In December, the average high-temperature is 42.3°F (5.7°C), and the average low-temperature is 34.7°F (1.5°C).

What is the most humid month in Marysville?

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

What is the average humidity in December in Marysville?

The average relative humidity in December in Marysville, Washington, is 85%.

How many days does it rain in December in Marysville?

In Marysville, Washington, during December, the rain falls for 19.3 days and regularly aggregates up to 3.82" (97mm) of precipitation.

How many days does it snow in December in Marysville?

In December, it is snowing for 1.5 days. Throughout December, 0.51" (13mm) of snow is accumulated.

What is the month with the shortest days in Marysville?

December has the shortest days of the year in Marysville, Washington, with an average of 8h and 27min of daylight.

How many hours of daylight does Marysville have in December?

In Marysville, the average day length in December is 8h and 27min.

When are sunrise and sunset in December in Marysville?

In December, on the first day of the month, sunrise is at 7:37 am and sunset at 4:17 pm. On the last day of the month, sunrise is at 7:58 am and sunset at 4:24 pm PST.

What is the month with the least sunshine in Marysville?

The months with the least sunshine in Marysville are January and December, with an average of 4.2h of sunshine.

How long on average sun shines in December in Marysville?

In December, the average sunshine duration in Marysville is 4.2h.

What are the months with the lowest UV index in Marysville?

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

What is the UV index reading in December in Marysville?

In December, the average daily maximum UV index in Marysville, Washington, is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability 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
Marysville, WA

Average temperature in December - Marysville, WA
  • Average high temperature in December: 42.3°F

The warmest month (with the highest average high temperature) is August (73°F).
The month with the lowest average high temperature is December (42.3°F).

  • Average low temperature in December: 34.7°F

The month with the highest average low temperature is August (52.5°F).
The coldest month (with the lowest average low temperature) is December (34.7°F).

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Average pressure in December
Marysville, WA

Average pressure in December - Marysville, WA
  • Average pressure in December: 30.08"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).

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Average wind speed in December
Marysville, WA

Average wind speed in December - Marysville, WA
  • Average wind speed in December: 5.4mph

The windiest months (with the highest average wind speed) are March and November (5.8mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).

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Average humidity in December
Marysville, WA

Average humidity in December - Marysville, WA
  • Average humidity in December: 85%

The months with the highest relative humidity are January and December (85%).
The month with the lowest relative humidity is July (73%).

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Average rainfall in December
Marysville, WA

Average rainfall in December - Marysville, WA
  • Average rainfall in December: 3.82"

The wettest month (with the highest rainfall) is November (4.06").
The driest month (with the least rainfall) is July (0.47").

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Average rainfall days in December
Marysville, WA

Average rainfall days in December - Marysville, WA
  • Average rainfall days in December: 19.3 days

The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (6.1 days).

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Average snowfall in December
Marysville, WA

Average snowfall in December - Marysville, WA
  • Average snowfall in December: 0.51"

The month with the highest snowfall is February (2.68").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
Marysville, WA

Average snowfall days in December - Marysville, WA
  • Average snowfall days in December: 1.5 days

The month with the highest number of snowfall days is February (3.1 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
Marysville, WA

Average daylight in December / Average sunshine in December - Marysville, WA
  • Average daylight in December: 8h and 27min

The month with the longest days is June (Average daylight: 15h and 59min).
The month with the shortest days is December (Average daylight: 8h and 27min).

  • Average sunshine in December: 4h and 12min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are January and December (Average sunshine: 4h and 12min).

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Average sunshine days in December
Marysville, WA

Average sunshine days in December - Marysville, WA
  • Average sunshine days in December: 10.1 days

The month with the most sunshine days is August (23.1 days).
The months with the least sunshine days are February and November (8.6 days).

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Average UV index in December
Marysville, WA

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

The months with the highest UV index are June and July (UV index 5).
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
Marysville, WA

Average cloud cover in December - Marysville, WA
  • Average cloud cover in December: 57

The month with the most cloud cover is December (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 26).

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Average visibility in December
Marysville, WA

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

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

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