December weather forecast
Dulwich, WA

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Weather in December

The first month of the winter, December, is also a subzero cold month in Dulwich, Washington, with an average temperature fluctuating between 28.9°F (-1.7°C) and 16.9°F (-8.4°C).

Temperature

The coldest period tends to be December, when average temperatures fluctuate between a high of 28.9°F (-1.7°C) and a low of 16.9°F (-8.4°C).

Humidity

The average relative humidity in December in Dulwich, Washington, is 91%.

Rainfall

In Dulwich, in December, it is raining for 11.7 days, with typically 1.61" (41mm) of accumulated precipitation. In Dulwich, during the entire year, the rain falls for 156.3 days and collects up to 16.18" (411mm) of precipitation.

Snowfall

January through April, September through December are months with snowfall in Dulwich. In Dulwich, in December, during 13.7 snowfall days, 6.5" (165mm) of snow is typically accumulated. Throughout the year, there are 53.2 snowfall days, and 25.16" (639mm) of snow is accumulated.

Daylight

The month with the shortest days in Dulwich is December, with an average of 8h and 18min of daylight.
On the first day of the month, sunrise is at 7:25 am and sunset at 3:58 pm. On the last day of December, sunrise is at 7:46 am and sunset at 4:06 pm PST.

Sunshine

In Dulwich, the average sunshine in December is 4.3h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: In December, the maximum UV index of 1 translates into these guidelines:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Stay sun-safe with clothing that is both closely woven and worn loosely. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
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Frequently asked questions

What is the coldest month in Dulwich?

December, recording an average high temperature of 28.9°F (-1.7°C) and a low temperature of 16.9°F (-8.4°C), is Dulwich's coldest month.

How cold is it in Dulwich in December?

The high-temperature, in December, in Dulwich, records 28.9°F (-1.7°C), while the low-temperature is 16.9°F (-8.4°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, in August is computed to be 82.4°F (28°C).

What is the average humidity in December in Dulwich?

In Dulwich, the average relative humidity in December is 91%.

How many days does it rain in December in Dulwich?

In Dulwich, Washington, in December, during 11.7 rainfall days, 1.61" (41mm) of precipitation is typically accumulated.

How much does it snow in Dulwich in December?

In Dulwich, in December, snow falls for 13.7 days, with typically accumulated 6.5" (165mm) of snow.

What is the month with the shortest days in Dulwich?

With an average of 8h and 18min of daylight, December has the shortest days of the year in Dulwich, Washington.

How many hours of daylight does Dulwich have in December?

The average day length in December in Dulwich is 8h and 20min.

When is the sunrise / sunset in December in Dulwich?

In December, on the first day of the month, sunrise is at 7:25 am and sunset at 3:58 pm. On the last day of the month, in Dulwich, sunrise is at 7:46 am and sunset at 4:06 pm PST.

How many hours of sunshine does Dulwich have in December?

In December, the average sunshine duration is 4.3h.

When is the lowest UV index in Dulwich?

The months with the lowest UV index in Dulwich, Washington, are January, February, November and December, with an average maximum UV index of 1.

What is the UV index reading in December in Dulwich?

The average daily maximum UV index in December in Dulwich, Washington, is 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from 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
Dulwich, WA

Average temperature in December - Dulwich, WA
  • Average high temperature in December: 28.9°F

The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (28.9°F).

  • Average low temperature in December: 16.9°F

The month with the highest average low temperature is August (50.5°F).
The coldest month (with the lowest average low temperature) is February (16°F).

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Average pressure in December
Dulwich, WA

Average pressure in December - Dulwich, WA
  • Average pressure in December: 30.18"Hg

The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are June and August (29.92"Hg).

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Average wind speed in December
Dulwich, WA

Average wind speed in December - Dulwich, WA
  • Average wind speed in December: 3mph

The windiest month (with the highest average wind speed) is April (3.9mph).
The calmest months (with the lowest average wind speed) are January, February and December (3mph).

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Average humidity in December
Dulwich, WA

Average humidity in December - Dulwich, WA
  • Average humidity in December: 91%

The month with the highest relative humidity is January (94%).
The month with the lowest relative humidity is August (50%).

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Average rainfall in December
Dulwich, WA

Average rainfall in December - Dulwich, WA
  • Average rainfall in December: 1.61"

The wettest month (with the highest rainfall) is May (1.93").
The driest month (with the least rainfall) is August (0.39").

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Average rainfall days in December
Dulwich, WA

Average rainfall days in December - Dulwich, WA
  • Average rainfall days in December: 11.7 days

The month with the highest number of rainy days is March (18.4 days).
The month with the least rainy days is August (6.1 days).

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Average snowfall in December
Dulwich, WA

Average snowfall in December - Dulwich, WA
  • Average snowfall in December: 6.5"

The month with the highest snowfall is January (6.61").
The months with the least snowfall are May, June, July and August (0").

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Average snowfall days in December
Dulwich, WA

Average snowfall days in December - Dulwich, WA
  • Average snowfall days in December: 13.7 days

The month with the highest number of snowfall days is December (13.7 days).
The months with the least snowfall days are May, June, July and August (0 days).

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

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

The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).

  • Average sunshine in December: 4h and 2min

The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

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Average sunshine days in December
Dulwich, WA

Average sunshine days in December - Dulwich, WA
  • Average sunshine days in December: 12.3 days

The month with the most sunshine days is August (20.8 days).
The month with the least sunshine days is March (9 days).

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Average UV index in December
Dulwich, WA

Average UV index in December - Dulwich, WA
  • Average UV index in December: 1

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 1).

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Average cloud cover in December
Dulwich, WA

Average cloud cover in December - Dulwich, WA
  • Average cloud cover in December: 55

The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 14).

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Average visibility in December
Dulwich, WA

Average visibility in December - Dulwich, WA
  • Average visibility in December: 4mi

The months with the highest visibility are May, June, July, August and September (6mi).
The month with the lowest visibility is January (2mi).

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Dulwich, Washington, USA

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