December weather forecast
Sweet Briar Park, VA

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Weather in December

The first month of the winter, December, is also a frosty month in Sweet Briar Park, Virginia, with an average temperature varying between 49.1°F (9.5°C) and 34.9°F (1.6°C).

Temperature

Sweet Briar Park records a mild change in average high-temperature during December, easing from a mild 56.7°F (13.7°C) in November to a chilly 49.1°F (9.5°C). The average temperature during December nights dips to an icy 34.9°F (1.6°C).

Humidity

December is the most humid month, with an average relative humidity of 78%.

Rainfall

In Sweet Briar Park, in December, it is raining for 10.1 days, with typically 1.93" (49mm) of accumulated precipitation. Throughout the year, there are 151.1 rainfall days, and 26.22" (666mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December. In Sweet Briar Park, Virginia, during December, snow falls for 1.5 days and regularly aggregates up to 1.5" (38mm) of snow. Throughout the year, in Sweet Briar Park, there are 10.5 snowfall days, and 6.42" (163mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 36min of daylight.
On the first day of December, sunrise is at 7:06 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:01 pm EST.

Sunshine

With an average of 5.2h of sunshine, December has the least sunshine of the year.

UV index

The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the average person.
Note: In December, a regular UV index of 2 translates into these guidelines:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. To guard against the harmful effects of the Sun, minimize exposure during midday. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Updated: Jul 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average December temperature?

Sweet Briar Park in December has an average high-temperature of 49.1°F (9.5°C) and an average low-temperature of 34.9°F (1.6°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines air temperature and relative humidity, in September is calculated to be 86°F (30°C).

What is the most humid month in Sweet Briar Park?

December is the most humid month, with an average relative humidity of 78%.

What is the average humidity in December?

The average relative humidity in December is 78%.

How many days does it rain in December?

In Sweet Briar Park, during December, the rain falls for 10.1 days and regularly aggregates up to 1.93" (49mm) of precipitation.

How much does it snow in December?

In December, it is snowing for 1.5 days. Throughout December, 1.5" (38mm) of snow is accumulated.

What is the month with the shortest days in Sweet Briar Park?

December has the shortest days of the year, with an average of 9h and 36min of daylight.

What is the average length of the day in December?

The average day length in December is 9h and 37min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:06 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:01 pm EST.

What is the month with the least sunshine in Sweet Briar Park?

December has the least sunshine of the year, with an average of 5.2h of sunshine.

How many hours of sunshine does Sweet Briar Park have in December?

The average sunshine duration in December is 5.2h.

What is the month with the lowest UV index?

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

What is the UV index reading in December in Sweet Briar Park?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health risk 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
Sweet Briar Park, VA

Average temperature in December - Sweet Briar Park, VA
  • Average high temperature in December: 49.1°F

The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (44.2°F).

  • Average low temperature in December: 34.9°F

The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).

Average pressure in December
Sweet Briar Park, VA

Average pressure in December - Sweet Briar Park, VA
  • Average pressure in December: 30.12"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).

Average wind speed in December
Sweet Briar Park, VA

Average wind speed in December - Sweet Briar Park, VA
  • Average wind speed in December: 6mph

The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in December
Sweet Briar Park, VA

Average humidity in December - Sweet Briar Park, VA
  • Average humidity in December: 78%

The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (68%).

Average rainfall in December
Sweet Briar Park, VA

Average rainfall in December - Sweet Briar Park, VA
  • Average rainfall in December: 1.93"

The wettest month (with the highest rainfall) is August (2.72").
The driest month (with the least rainfall) is September (1.65").

Average rainfall days in December
Sweet Briar Park, VA

Average rainfall days in December - Sweet Briar Park, VA
  • Average rainfall days in December: 10.1 days

The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is November (8.8 days).

Average snowfall in December
Sweet Briar Park, VA

Average snowfall in December - Sweet Briar Park, VA
  • Average snowfall in December: 1.5"

The month with the highest snowfall is February (1.77").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Sweet Briar Park, VA

Average snowfall days in December - Sweet Briar Park, VA
  • Average snowfall days in December: 1.5 days

The month with the highest number of snowfall days is February (3.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Sweet Briar Park, VA

Average daylight in December / Average sunshine in December - Sweet Briar Park, VA
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).

Average sunshine days in December
Sweet Briar Park, VA

Average sunshine days in December - Sweet Briar Park, VA
  • Average sunshine days in December: 19.2 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is May (11.9 days).

Average UV index in December
Sweet Briar Park, VA

Average UV index in December - Sweet Briar Park, VA
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).

Average cloud cover in December
Sweet Briar Park, VA

Average cloud cover in December - Sweet Briar Park, VA
  • Average cloud cover in December: 44

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in December
Sweet Briar Park, VA

Average visibility in December - Sweet Briar Park, 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).

Sweet Briar Park, Virginia, USA

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