December weather forecast
Chimacum, WA

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Weather in December

December, the first month of the winter in Chimacum, is also a frosty month, with an average temperature ranging between min 37.6°F (3.1°C) and max 43°F (6.1°C).

Temperature

In Chimacum, the lowest average temperatures are observed in December, with a high of 43°F (6.1°C) and a low of 37.6°F (3.1°C).

Humidity

In December, the average relative humidity is 82%.

Rainfall

In Chimacum, in December, it is raining for 18.2 days, with typically 2.52" (64mm) of accumulated precipitation. In Chimacum, during the entire year, the rain falls for 180.3 days and collects up to 21.85" (555mm) of precipitation.

Snowfall

Months with snowfall are January through April, November and December. In Chimacum, during December, snow falls for 1 days and regularly aggregates up to 0.2" (5mm) of snow. In Chimacum, during the entire year, snow falls for 7.8 days and aggregates up to 4.84" (123mm) of snow.

Daylight

December has the shortest days of the year, with an average of 8h and 30min of daylight.
On the first day of December in Chimacum, sunrise is at 7:40 am and sunset at 4:20 pm. On the last day of the month, sunrise is at 8:00 am and sunset at 4:28 pm PST.

Sunshine

In December, the average sunshine in Chimacum, Washington, is 4.9h.

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 value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 2 during December leads to these instructions:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
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Frequently asked questions

What is the coldest time of year in Chimacum?

The coldest period in Chimacum, Washington, tends to be December, when average temperatures fluctuate between a high of 43°F (6.1°C) and a low of 37.6°F (3.1°C).

Is it cold in Chimacum during December?

The high-temperature, in December, in Chimacum, records 43°F (6.1°C), while the low-temperature is 37.6°F (3.1°C).

What is the average humidity in December in Chimacum?

In December, the average relative humidity in Chimacum is 82%.

How many days does it rain in December in Chimacum?

In Chimacum, in December, it is raining for 18.2 days, with typically 2.52" (64mm) of accumulated precipitation.

How many days does it snow in December in Chimacum?

In Chimacum, during December, snow falls for 1 days and regularly aggregates up to 0.2" (5mm) of snow.

What is the month with the shortest days in Chimacum?

December has the shortest days of the year in Chimacum, Washington, with an average of 8h and 30min of daylight.

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

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

What time are sunrise and sunset in December in Chimacum?

On the first day of December in Chimacum, sunrise is at 7:40 am and sunset at 4:20 pm. On the last day of the month, sunrise is at 8:00 am and sunset at 4:28 pm PST.

How long on average sun shines in December in Chimacum?

In December, the average sunshine duration in Chimacum, Washington, is 4.9h.

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

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

How high is the UV index in December in Chimacum?

The average daily maximum UV index in December 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
Chimacum, WA

Average temperature in December - Chimacum, WA
  • Average high temperature in December: 43°F

The warmest month (with the highest average high temperature) is August (67.8°F).
The month with the lowest average high temperature is December (43°F).

  • Average low temperature in December: 37.6°F

The month with the highest average low temperature is August (55.4°F).
The coldest month (with the lowest average low temperature) is February (37.4°F).

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Average pressure in December
Chimacum, WA

Average pressure in December - Chimacum, WA
  • Average pressure in December: 30.06"Hg

The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are March and September (30.01"Hg).

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Average wind speed in December
Chimacum, WA

Average wind speed in December - Chimacum, WA
  • Average wind speed in December: 7.1mph

The windiest month (with the highest average wind speed) is November (7.4mph).
The calmest month (with the lowest average wind speed) is August (4mph).

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Average humidity in December
Chimacum, WA

Average humidity in December - Chimacum, WA
  • Average humidity in December: 82%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is July (75%).

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Average rainfall in December
Chimacum, WA

Average rainfall in December - Chimacum, WA
  • Average rainfall in December: 2.52"

The wettest month (with the highest rainfall) is November (2.91").
The driest month (with the least rainfall) is July (0.43").

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Average rainfall days in December
Chimacum, WA

Average rainfall days in December - Chimacum, WA
  • Average rainfall days in December: 18.2 days

The month with the highest number of rainy days is March (20.7 days).
The month with the least rainy days is August (6.6 days).

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Average snowfall in December
Chimacum, WA

Average snowfall in December - Chimacum, WA
  • Average snowfall in December: 0.2"

The month with the highest snowfall is February (2.87").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
Chimacum, WA

Average snowfall days in December - Chimacum, WA
  • Average snowfall days in December: 1 days

The month with the highest number of snowfall days is February (2.8 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
Chimacum, WA

Average daylight in December / Average sunshine in December - Chimacum, WA
  • Average daylight in December: 8h and 3min

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 30min).

  • Average sunshine in December: 4h and 5min

The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).

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Average sunshine days in December
Chimacum, WA

Average sunshine days in December - Chimacum, WA
  • Average sunshine days in December: 10.7 days

The month with the most sunshine days is August (22.3 days).
The month with the least sunshine days is March (8.2 days).

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Average UV index in December
Chimacum, WA

Average UV index in December - Chimacum, 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, November and December (UV index 2).

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Average cloud cover in December
Chimacum, WA

Average cloud cover in December - Chimacum, WA
  • Average cloud cover in December: 50

The months with the most cloud cover are January, February and December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 21).

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Average visibility in December
Chimacum, WA

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

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

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Chimacum, Washington, USA

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