December weather forecast
Yorktown, VA

Weather in December

December, the first month of the winter in Yorktown, is also a fresh month, with an average temperature fluctuating between 38.3°F (3.5°C) and 50.2°F (10.1°C).

Temperature

In Yorktown, Virginia, the average high-temperature in December slightly decreases from a moderate 57.4°F (14.1°C) in November to a cool 50.2°F (10.1°C). In Yorktown, the average low-temperature is 38.3°F (3.5°C).

Humidity

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

Rainfall

In December, the rain falls for 12.2 days. Throughout December, 2.6" (66mm) of precipitation is accumulated. Throughout the year, in Yorktown, there are 165.3 rainfall days, and 34.25" (870mm) of precipitation is accumulated.

Snowfall

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

Ocean temperature

In Yorktown, the average seawater temperature in December is 55.2°F (12.9°C).
Note: 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.

Daylight

With an average of 9h and 39min of daylight, December has the shortest days of the year in Yorktown.
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

The average sunshine in December in Yorktown 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 value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The average daily UV index of 2 in December transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
[Resources]

FAQ

What is the most humid month in Yorktown?

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

What is the average humidity in December in Yorktown?

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

How much does it rain in Yorktown in December?

In Yorktown, in December, it is raining for 12.2 days, with typically 2.6" (66mm) of accumulated precipitation.

How much does it snow in Yorktown in December?

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

What is the ocean temperature in December in Yorktown?

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 in Yorktown?

December has the shortest days of the year, with an average of 9h and 39min of daylight.

What is the average length of the day in December in Yorktown?

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

When are sunrise and sunset in December in Yorktown?

On the first day of December in Yorktown, Virginia, 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 many hours of sunshine does Yorktown have in December?

The average sunshine duration in December in Yorktown, Virginia, is 5.4h.

What are the months with the lowest UV index in Yorktown?

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 Yorktown?

The average daily maximum UV index in December in Yorktown, Virginia, is 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation.

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).

[Resources]

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).

[Resources]

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).

[Resources]

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%).

[Resources]

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").

[Resources]

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).

[Resources]

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").

[Resources]

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).

[Resources]

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).

[Resources]

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 39min

The month with the longest days is June (Average daylight: 14h and 41min).
The month with the shortest days is December (Average daylight: 9h and 39min).

  • Average sunshine in December: 5.4h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 5.2h).

[Resources]

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).

[Resources]

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).

[Resources]

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).

[Resources]

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).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location