Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
With the arrival of December, Yorktown experiences a modest decline in average high-temperatures, transitioning from a mild 57.4°F (14.1°C) in November to a cool 50.2°F (10.1°C). During the nights in December, Yorktown observes an average low-temperature of 38.3°F (3.5°C).Humidity
December is the most humid month, with an average relative humidity of 78%.Rainfall
In Yorktown, Virginia, in December, during 12.2 rainfall days, 2.6" (66mm) of precipitation is typically accumulated. Throughout the year, in Yorktown, there are 165.3 rainfall days, and 34.25" (870mm) of precipitation is accumulated.Snowfall
Months with snowfall in Yorktown are January through March, November and December. In December, in Yorktown, 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, the average seawater temperature in December is 55.2°F (12.9°C).Note: While a brief time in 55.2°F (12.9°C) at 55.4°F (13°C) is already bracing, plunging below 50°F (10°C) can severely affect breathing and introduce a cold shock, relying on your physical state.
Daylight
December has the shortest days of the year, with an average of 9h and 42min of daylight.On the first day of December in Yorktown, 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 Yorktown, Virginia, the average sunshine in December is 5.4h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index in Yorktown. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum high daily UV index of 2 during December translates into the following directions:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Boost your sun resistance with garments that are densely woven yet spacious. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Frequently asked questions
What is the usual temperature for Yorktown in December?
What is the most humid month in Yorktown?
What is the average humidity in December in Yorktown?
How many days does it rain in December in Yorktown?
How many days does it snow in December in Yorktown?
What is the water temperature in December in Yorktown?
What is the month with the shortest days in Yorktown?
What is the average length of the day in December in Yorktown?
When is the sunrise / sunset in December in Yorktown?
How many hours of sunshine does Yorktown have in December?
What is the month with the lowest UV index in Yorktown?
How high is the UV index in December in Yorktown?
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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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: 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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