December weather forecast
Colonial Beach, VA

Weather in December

The first month of the winter, December, is still a chilly month in Colonial Beach, Virginia, with an average temperature varying between 47.5°F (8.6°C) and 35.1°F (1.7°C).

Temperature

In Colonial Beach, the average high-temperature in December slightly decreases from a mild 55.8°F (13.2°C) in November to a frosty 47.5°F (8.6°C). In Colonial Beach, Virginia, the average low-temperature is 35.1°F (1.7°C).

Humidity

May and December, with an average relative humidity of 78%, are the most humid months.

Rainfall

In Colonial Beach, Virginia, during December, the rain falls for 10.7 days and regularly aggregates up to 2.44" (62mm) of precipitation. Throughout the year, in Colonial Beach, there are 158.1 rainfall days, and 30.47" (774mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Colonial Beach, Virginia, are January through April, November and December. In Colonial Beach, during 2 snowfall days, 1.26" (32mm) of snow is typically accumulated. Throughout the year, in Colonial Beach, there are 12 snowfall days, and 6.73" (171mm) of snow is accumulated.

Ocean temperature

In Colonial Beach, Virginia, the average seawater temperature in December is 53.4°F (11.9°C).
Note: Swimming in 53.4°F (11.9°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

With an average of 9h and 34min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:05 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:57 pm EST.

Sunshine

February and December, with an average of 5.1h of sunshine, are months with the least sunshine.

UV index

The months with the lowest UV index in Colonial Beach are January, February and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the average person.
Note: The average daily UV index of 2 in December transform into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from 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 are the most humid months in Colonial Beach?

The months with the highest humidity are May and December, with an average relative humidity of 78%.

What is the average humidity in December in Colonial Beach?

In Colonial Beach, the average relative humidity in December is 78%.

How many days does it rain in December in Colonial Beach?

In Colonial Beach, in December, during 10.7 rainfall days, 2.44" (62mm) of precipitation is typically accumulated.

How many days does it snow in December in Colonial Beach?

In Colonial Beach, during December, snow falls for 2 days and regularly aggregates up to 1.26" (32mm) of snow.

What is the water temperature in December in Colonial Beach?

In Colonial Beach, in December, the average water temperature is 53.4°F (11.9°C). Swimming in 53.4°F (11.9°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the month with the shortest days in Colonial Beach?

December has the shortest days of the year, with an average of 9h and 34min of daylight.

What is the average length of the day in December in Colonial Beach?

The average day length in December in Colonial Beach, Virginia, is 9h and 34min.

When is the sunrise / sunset in December in Colonial Beach?

In December, on the first day of the month, sunrise is at 7:05 am and sunset at 4:48 pm. On the last day of the month, in Colonial Beach, Virginia, sunrise is at 7:24 am and sunset at 4:57 pm EST.

What is the month with the least sunshine in Colonial Beach?

The months with the least sunshine in Colonial Beach, Virginia, are February and December, with an average of 5.1h of sunshine.

How many hours of sunshine does Colonial Beach have in December?

The average sunshine duration in December in Colonial Beach is 5.1h.

When is the lowest UV index in Colonial Beach?

The months with the lowest UV index in Colonial Beach, Virginia, are January, February and December, with an average maximum UV index of 2.

What is the UV index reading in December in Colonial Beach?

In Colonial Beach, Virginia, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation.

Average temperature in December
Colonial Beach, VA

Average temperature in December - Colonial Beach, VA
  • Average high temperature in December: 47.5°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (42.3°F).

  • Average low temperature in December: 35.1°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).

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Average pressure in December
Colonial Beach, VA

Average pressure in December - Colonial Beach, VA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

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Average wind speed in December
Colonial Beach, VA

Average wind speed in December - Colonial Beach, VA
  • Average wind speed in December: 6.6mph

The windiest month (with the highest average wind speed) is April (8mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

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Average humidity in December
Colonial Beach, VA

Average humidity in December - Colonial Beach, VA
  • Average humidity in December: 78%

The months with the highest relative humidity are May and December (78%).
The month with the lowest relative humidity is April (73%).

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Average rainfall in December
Colonial Beach, VA

Average rainfall in December - Colonial Beach, VA
  • Average rainfall in December: 2.44"

The wettest months (with the highest rainfall) are July and August (3.19").
The driest month (with the least rainfall) is September (1.97").

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Average rainfall days in December
Colonial Beach, VA

Average rainfall days in December - Colonial Beach, VA
  • Average rainfall days in December: 10.7 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (9.4 days).

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Average snowfall in December
Colonial Beach, VA

Average snowfall in December - Colonial Beach, VA
  • Average snowfall in December: 1.26"

The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
Colonial Beach, VA

Average snowfall days in December - Colonial Beach, VA
  • Average snowfall days in December: 2 days

The month with the highest number of snowfall days is January (4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in December
Colonial Beach, VA

Average sea temperature in December - Colonial Beach, VA
  • Average sea temperature in December: 53.3°F

The best month for swimming (with the highest average sea temperature) is August (78.4°F).
The coldest month (with the lowest average sea temperature) is February (47.1°F).

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Average daylight in December /
Average sunshine in December
Colonial Beach, VA

Average daylight in December / Average sunshine in December - Colonial Beach, VA
  • Average daylight in December: 9h and 34min

The month with the longest days is June (Average daylight: 14h and 47min).
The month with the shortest days is December (Average daylight: 9h and 34min).

  • Average sunshine in December: 5.1h

The month with the most sunshine is July (Average sunshine: 10.6h).
The months with the least sunshine are February and December (Average sunshine: 5.1).

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Average sunshine days in December
Colonial Beach, VA

Average sunshine days in December - Colonial Beach, VA
  • Average sunshine days in December: 18.1 days

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is May (11.9 days).

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Average UV index in December
Colonial Beach, VA

Average UV index in December - Colonial Beach, VA
  • Average UV index in December: 2

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).

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Average cloud cover in December
Colonial Beach, VA

Average cloud cover in December - Colonial Beach, VA
  • Average cloud cover in December: 44

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in December
Colonial Beach, VA

Average visibility in December - Colonial Beach, VA
  • Average visibility in December: 6mi

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

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