December weather forecast
Rockport, WA

Weather in December

December, the first month of the winter in Rockport, is also a subzero cold month, with temperature in the range of an average low of 19.6°F (-6.9°C) and an average high of 30.7°F (-0.7°C).

Temperature

December is the coldest month, with an average high-temperature of 30.7°F (-0.7°C) and an average low-temperature of 19.6°F (-6.9°C).

Humidity

In December, the average relative humidity is 90%.

Rainfall

In Rockport, during 4.2 rainfall days, 7.95" (202mm) of precipitation is typically accumulated. In Rockport, during the entire year, the rain falls for 124 days and collects up to 55.28" (1404mm) of precipitation.

Snowfall

January through June, September through December are months with snowfall. In Rockport, in December, snow falls for 19.5 days, with typically accumulated 63.27" (1607mm) of snow. Throughout the year, there are 142 snowfall days, and 321.93" (8177mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Rockport, with an average of 8h and 23min of daylight.
On the first day of the month, sunrise is at 7:37 am and sunset at 4:13 pm. On the last day of December, sunrise is at 7:58 am and sunset at 4:20 pm PST.

Sunshine

The average sunshine in December is 3.9h.

UV index

In Rockport, Washington, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Rockport?

The coldest month in Rockport is December, with an average high-temperature of 30.7°F (-0.7°C) and an average low-temperature of 19.6°F (-6.9°C).

What is the temperature in December in Rockport?

The average high-temperature, in December, in Rockport, Washington, is 30.7°F (-0.7°C), while the average low-temperature is 19.6°F (-6.9°C).

What is the average humidity in December in Rockport?

In December, the average relative humidity in Rockport, Washington, is 90%.

How much does it rain in Rockport in December?

In Rockport, in December, it is raining for 4.2 days, with typically 7.95" (202mm) of accumulated precipitation.

How much does it snow in Rockport in December?

In Rockport, in December, during 19.5 snowfall days, 63.27" (1607mm) of snow is typically accumulated.

What is the month with the shortest days in Rockport?

December has the shortest days of the year in Rockport, Washington, with an average of 8h and 23min of daylight.

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

In Rockport, Washington, the average day length in December is 8h and 23min.

When are sunrise and sunset in December in Rockport?

On the first day of December in Rockport, Washington, sunrise is at 7:37 am and sunset at 4:13 pm. On the last day of the month, sunrise is at 7:58 am and sunset at 4:20 pm PST.

How long on average sun shines in December in Rockport?

The average sunshine duration in December in Rockport, Washington, is 3.9h.

How high is the UV index in December in Rockport?

The average daily maximum UV index in December in Rockport is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unprotected exposure to 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
Rockport, WA

Average temperature in December - Rockport, WA
  • Average high temperature in December: 30.7°F

The warmest month (with the highest average high temperature) is August (71.2°F).
The month with the lowest average high temperature is December (30.7°F).

  • Average low temperature in December: 19.6°F

The month with the highest average low temperature is August (43.7°F).
The coldest month (with the lowest average low temperature) is December (19.6°F).

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Average pressure in December
Rockport, WA

Average pressure in December - Rockport, WA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).

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Average wind speed in December
Rockport, WA

Average wind speed in December - Rockport, WA
  • Average wind speed in December: 4.3mph

The windiest month (with the highest average wind speed) is January (4.7mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).

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Average humidity in December
Rockport, WA

Average humidity in December - Rockport, WA
  • Average humidity in December: 90%

The months with the highest relative humidity are January, February and March (91%).
The months with the lowest relative humidity are July and August (71%).

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Average rainfall in December
Rockport, WA

Average rainfall in December - Rockport, WA
  • Average rainfall in December: 7.95"

The wettest month (with the highest rainfall) is January (9.25").
The driest month (with the least rainfall) is August (0.87").

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Average rainfall days in December
Rockport, WA

Average rainfall days in December - Rockport, WA
  • Average rainfall days in December: 4.2 days

The month with the highest number of rainy days is June (17.5 days).
The month with the least rainy days is February (3.8 days).

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Average snowfall in December
Rockport, WA

Average snowfall in December - Rockport, WA
  • Average snowfall in December: 63.27"

The month with the highest snowfall is January (71.57").
The months with the least snowfall are July and August (0").

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Average snowfall days in December
Rockport, WA

Average snowfall days in December - Rockport, WA
  • Average snowfall days in December: 19.5 days

The month with the highest number of snowfall days is March (22.8 days).
The month with the least snowfall days is August (0 days).

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

Average daylight in December / Average sunshine in December - Rockport, WA
  • Average daylight in December: 8h and 23min

The month with the longest days is June (Average daylight: 16h and 3min).
The month with the shortest days is December (Average daylight: 8h and 23min).

  • Average sunshine in December: 3h and 54min

The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days in December
Rockport, WA

Average sunshine days in December - Rockport, WA
  • Average sunshine days in December: 11.5 days

The month with the most sunshine days is August (18.1 days).
The month with the least sunshine days is April (6.5 days).

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Average UV index in December
Rockport, WA

Average UV index in December - Rockport, 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 and November (UV index 1).

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Average cloud cover in December
Rockport, WA

Average cloud cover in December - Rockport, WA
  • Average cloud cover in December: 59

The month with the most cloud cover is March (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 30).

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Average visibility in December
Rockport, WA

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

The months with the highest visibility are June, July, August and September (5mi).
The months with the lowest visibility are January and March (3mi).

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