December weather forecast
Yorktown, VA

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Weather in December

In December, Yorktown, Virginia goes into full winter mode. The temperatures continue to fall, and the possibility of snow re-emerges. The days become shorter, and the nights longer, implying a slowdown in outdoor activities. The number of daylight hours minimizes, engendering colder and darker days. It is the month with the lowest sea temperature, marking the halt of water activities. Overall, Yorktown in December showcases a tranquil and quiet winter period.

Temperature

December is marked by a subtle drop in average high-temperatures, transitioning from a mild 57.4°F (14.1°C) in November to a fresh 50.2°F (10.1°C). An average low-temperature of 38.3°F (3.5°C) is anticipated throughout the nights during December.

Humidity

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

Rainfall

In December, the rain falls for 12.2 days. Throughout December, 2.6" (66mm) of precipitation is accumulated. In Yorktown, during the entire year, the rain falls for 165.3 days and collects up to 34.25" (870mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall in Yorktown. In December, it is snowing for 1.1 days. Throughout December, 0.51" (13mm) of snow is accumulated. Throughout the year, there are 8.3 snowfall days, and 4.13" (105mm) of snow is accumulated.

Ocean temperature

In Yorktown, in December, the average water temperature is 55.2°F (12.9°C).
Note: Swimming in 55.2°F (12.9°C) can be lethal. Merely spending a few minutes in 55.4°F (13°C) waters feels harsh, and venturing below 50°F (10°C) might disrupt breathing control and bring about cold shock, contingent on individual resilience.

Daylight

The month with the shortest days is December, with an average of 9h and 42min of daylight.
On the first day of December, sunrise is at 7:01 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:58 pm EST.

Sunshine

In December, the average sunshine is 5.4h.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for average individuals.
Note: A maximum high daily UV index of 2 during December translates into the following directions:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Updated: Aug 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Yorktown in December?

The high-temperature during December is 50.2°F (10.1°C) and the low-temperature is 38.3°F (3.5°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines relative humidity and air temperature, is estimated at 95°F (35°C).

What is the most humid month?

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

What is the average humidity in December?

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

How many days does it rain in December?

In Yorktown, in December, during 12.2 rainfall days, 2.6" (66mm) of precipitation is typically accumulated.

How much does it snow in December?

In December, it is snowing for 1.1 days. Throughout December, 0.51" (13mm) of snow is accumulated.

How cold is the water in December?

In Yorktown, in December, the average water temperature is 55.2°F (12.9°C). Swimming in 55.2°F (12.9°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?

December has the shortest days of the year, with an average of 9h and 42min of daylight.

How many hours of daylight does Yorktown have in December?

In Yorktown, the average day length in December is 9h and 39min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:01 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:58 pm EST.

How long on average sun shines in December?

In December, the average sunshine duration is 5.4h.

What are the months with the lowest UV index?

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

What is the UV index reading in December?

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

Average temperature in December - Yorktown, VA
  • Average high temperature in December: 50.2°F

The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (45.1°F).

  • Average low temperature in December: 38.3°F

The month with the highest average low temperature is July (72.3°F).
The coldest month (with the lowest average low temperature) is January (32.5°F).

Average pressure in December
Yorktown, VA

Average pressure in December - Yorktown, VA
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in December
Yorktown, VA

Average wind speed in December - Yorktown, VA
  • Average wind speed in December: 8mph

The windiest month (with the highest average wind speed) is April (9.5mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).

Average humidity in December
Yorktown, VA

Average humidity in December - Yorktown, 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 (72%).

Average rainfall in December
Yorktown, VA

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

The wettest month (with the highest rainfall) is August (3.62").
The driest month (with the least rainfall) is September (2.4").

Average rainfall days in December
Yorktown, VA

Average rainfall days in December - Yorktown, VA
  • Average rainfall days in December: 12.2 days

The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is November (9.6 days).

Average snowfall in December
Yorktown, VA

Average snowfall in December - Yorktown, VA
  • Average snowfall in December: 0.51"

The month with the highest snowfall is February (1.34").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
Yorktown, VA

Average snowfall days in December - Yorktown, VA
  • Average snowfall days in December: 1.1 days

The month with the highest number of snowfall days is January (3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average sea temperature in December
Yorktown, VA

Average sea temperature in December - Yorktown, VA
  • Average sea temperature in December: 55.2°F

The best month for swimming (with the highest average sea temperature) is August (79.6°F).
The coldest month (with the lowest average sea temperature) is February (48.7°F).

Average daylight in December /
Average sunshine in December
Yorktown, VA

Average daylight in December / Average sunshine in December - Yorktown, 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 42min).

  • Average sunshine in December: 5h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).

Average sunshine days in December
Yorktown, VA

Average sunshine days in December - Yorktown, VA
  • Average sunshine days in December: 17.4 days

The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is May (11.5 days).

Average UV index in December
Yorktown, VA

Average UV index in December - Yorktown, VA
  • Average UV index in December: 2

The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).

Average cloud cover in December
Yorktown, VA

Average cloud cover in December - Yorktown, VA
  • Average cloud cover in December: 42

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).

Average visibility in December
Yorktown, VA

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

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

Yorktown, Virginia, USA

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