December weather forecast
Dumfries, VA

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Weather in December

The first month of the winter, December, is still a chilly month in Dumfries, Virginia, with an average temperature ranging between min 33.6°F (0.9°C) and max 46.9°F (8.3°C).

Temperature

Dumfries experiences a moderate temperature shift at the start of December, with average high-temperatures adjusting a bit from a fresh 55.2°F (12.9°C) in November to a chilly 46.9°F (8.3°C). An average minimum temperature of 33.6°F (0.9°C) marks the month of December.

Humidity

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

Rainfall

In December, in Dumfries, the rain falls for 10.4 days. Throughout December, 2.6" (66mm) of precipitation is accumulated. Throughout the year, there are 155.6 rainfall days, and 31.61" (803mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December. In Dumfries, during December, snow falls for 1.8 days and regularly aggregates up to 1.34" (34mm) of snow. In Dumfries, during the entire year, snow falls for 13.5 days and aggregates up to 8.23" (209mm) of snow.

Daylight

With an average of 9h and 30min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:08 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:58 pm EST.

Sunshine

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

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the average person.
Note: A typical high UV index of 2 in December suggests the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.

Frequently asked questions

What is the average December temperature?

During December, Dumfries experiences an average high-temperature of 46.9°F (8.3°C) and a low-temperature of 33.6°F (0.9°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in August is computed to be 98.6°F (37°C).

What is the most humid month in Dumfries?

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

What is the average humidity in December in Dumfries?

In December, the average relative humidity is 78%.

How much does it rain in December?

In Dumfries, during December, the rain falls for 10.4 days and regularly aggregates up to 2.6" (66mm) of precipitation.

How much does it snow in December?

In Dumfries, during December, snow falls for 1.8 days and regularly aggregates up to 1.34" (34mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 30min of daylight.

How many hours of daylight does Dumfries have in December?

In December, the average day length in Dumfries is 9h and 32min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:08 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:58 pm EST.

What are the months with the least sunshine in Dumfries?

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

How many hours of sunshine does Dumfries have in December?

In Dumfries, the average sunshine duration in December is 5.1h.

What are the months with the lowest UV index?

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

How high is the UV index in December in Dumfries?

In Dumfries, the average daily maximum UV index in December is 2. A UV Index reading 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
Dumfries, VA

Average temperature in December - Dumfries, VA
  • Average high temperature in December: 46.9°F

The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (41.5°F).

  • Average low temperature in December: 33.6°F

The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).

Average pressure in December
Dumfries, VA

Average pressure in December - Dumfries, 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).

Average wind speed in December
Dumfries, VA

Average wind speed in December - Dumfries, VA
  • Average wind speed in December: 6.1mph

The windiest months (with the highest average wind speed) are March and April (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

Average humidity in December
Dumfries, VA

Average humidity in December - Dumfries, VA
  • Average humidity in December: 78%

The months with the highest relative humidity are October and December (78%).
The months with the lowest relative humidity are January, April and July (73%).

Average rainfall in December
Dumfries, VA

Average rainfall in December - Dumfries, VA
  • Average rainfall in December: 2.6"

The wettest month (with the highest rainfall) is August (3.66").
The driest month (with the least rainfall) is January (1.97").

Average rainfall days in December
Dumfries, VA

Average rainfall days in December - Dumfries, VA
  • Average rainfall days in December: 10.4 days

The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is November (8.7 days).

Average snowfall in December
Dumfries, VA

Average snowfall in December - Dumfries, VA
  • Average snowfall in December: 1.34"

The month with the highest snowfall is January (2.52").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Dumfries, VA

Average snowfall days in December - Dumfries, VA
  • Average snowfall days in December: 1.8 days

The month with the highest number of snowfall days is January (4.9 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
Dumfries, VA

Average daylight in December / Average sunshine in December - Dumfries, VA
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The months with the least sunshine are February and December (Average sunshine: 5h and 6min).

Average sunshine days in December
Dumfries, VA

Average sunshine days in December - Dumfries, VA
  • Average sunshine days in December: 17.8 days

The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (11.5 days).

Average UV index in December
Dumfries, VA

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

Average cloud cover in December
Dumfries, VA

Average cloud cover in December - Dumfries, VA
  • Average cloud cover in December: 46

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in December
Dumfries, VA

Average visibility in December - Dumfries, VA
  • Average visibility in December: 6mi

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

Dumfries, Virginia, USA

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