December weather forecast
Sinclair Manor, VA

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Weather in December

The first month of the winter, December, is still a chilly month in Sinclair Manor, Virginia, with an average temperature fluctuating between 49.1°F (9.5°C) and 35.2°F (1.8°C).

Temperature

In December, the average high-temperature marginally decreases from a mild 56.8°F (13.8°C) in November to a frosty 49.1°F (9.5°C). During December, Sinclair Manor experiences a consistent low-temperature average of 35.2°F (1.8°C).

Humidity

December is the most humid month, with an average relative humidity of 79%.

Rainfall

In Sinclair Manor, in December, during 11.2 rainfall days, 2.52" (64mm) of precipitation is typically accumulated. Throughout the year, there are 157.7 rainfall days, and 30.71" (780mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In Sinclair Manor, during December, snow falls for 1.8 days and regularly aggregates up to 1.85" (47mm) of snow. In Sinclair Manor, during the entire year, snow falls for 11.4 days and aggregates up to 7.87" (200mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 36min of daylight.
On the first day of the month, sunrise is at 7:05 am and sunset at 4:50 pm. On the last day of December, sunrise is at 7:23 am and sunset at 5:00 pm EST.

Sunshine

February and December, with an average of 5.3h of sunshine, are months with the least sunshine.

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum UV index of 2 in December translates into the following recommendations:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Updated: Aug 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average December temperature?

The high-temperature during December is 49.1°F (9.5°C) and the low-temperature is 35.2°F (1.8°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in September is computed to be 84.2°F (29°C).

What is the most humid month?

With an average relative humidity of 79%, December is the most humid month.

What is the average humidity in December in Sinclair Manor?

In Sinclair Manor, the average relative humidity in December is 79%.

How much does it rain in December?

In Sinclair Manor, in December, it is raining for 11.2 days, with typically 2.52" (64mm) of accumulated precipitation.

How much does it snow in December?

In Sinclair Manor, in December, snow falls for 1.8 days, with typically accumulated 1.85" (47mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 36min of daylight.

How many hours of daylight does Sinclair Manor have in December?

In December, the average day length is 9h and 37min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:05 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:00 pm EST.

What are the months with the least sunshine in Sinclair Manor?

February and December, with an average of 5.3h of sunshine, are months with the least sunshine.

How many hours of sunshine does Sinclair Manor have in December?

In December, the average sunshine duration is 5.3h.

When is the lowest UV index?

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

How high is the UV index in December?

The average daily maximum UV index in December is 2. A UV Index estimate 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
Sinclair Manor, VA

Average temperature in December - Sinclair Manor, VA
  • Average high temperature in December: 49.1°F

The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (44.2°F).

  • Average low temperature in December: 35.2°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 (29.3°F).

Average pressure in December
Sinclair Manor, VA

Average pressure in December - Sinclair Manor, 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
Sinclair Manor, VA

Average wind speed in December - Sinclair Manor, 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 (5.1mph).

Average humidity in December
Sinclair Manor, VA

Average humidity in December - Sinclair Manor, VA
  • Average humidity in December: 79%

The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is July (71%).

Average rainfall in December
Sinclair Manor, VA

Average rainfall in December - Sinclair Manor, VA
  • Average rainfall in December: 2.52"

The wettest month (with the highest rainfall) is August (2.99").
The driest month (with the least rainfall) is September (1.77").

Average rainfall days in December
Sinclair Manor, VA

Average rainfall days in December - Sinclair Manor, VA
  • Average rainfall days in December: 11.2 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (9.8 days).

Average snowfall in December
Sinclair Manor, VA

Average snowfall in December - Sinclair Manor, VA
  • Average snowfall in December: 1.85"

The month with the highest snowfall is January (1.93").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Sinclair Manor, VA

Average snowfall days in December - Sinclair Manor, VA
  • Average snowfall days in December: 1.8 days

The month with the highest number of snowfall days is January (3.9 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
Sinclair Manor, VA

Average daylight in December / Average sunshine in December - Sinclair Manor, 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 2min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 5h and 18min).

Average sunshine days in December
Sinclair Manor, VA

Average sunshine days in December - Sinclair Manor, VA
  • Average sunshine days in December: 18.4 days

The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (11.8 days).

Average UV index in December
Sinclair Manor, VA

Average UV index in December - Sinclair Manor, 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 and December (UV index 2).

Average cloud cover in December
Sinclair Manor, VA

Average cloud cover in December - Sinclair Manor, 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 32).

Average visibility in December
Sinclair Manor, VA

Average visibility in December - Sinclair Manor, VA
  • Average visibility in December: 5mi

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

Sinclair Manor, Virginia, USA

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