December weather forecastPort Royal, VA
December
Weather in December
The first month of the winter, December, is also a frosty month in Port Royal, Virginia, with an average temperature varying between 35.1°F (1.7°C) and 47.5°F (8.6°C).Temperature
December is characterized by a mild reduction in the average high-temperature, from a refreshing 55.8°F (13.2°C) in November to a frosty 47.5°F (8.6°C). During December, Port Royal experiences a consistent low-temperature average of 35.1°F (1.7°C).Humidity
May and December, with an average relative humidity of 78%, are the most humid months.Rainfall
In Port Royal, in December, during 10.7 rainfall days, 2.44" (62mm) of precipitation is typically accumulated. In Port Royal, during the entire year, the rain falls for 158.1 days and collects up to 30.47" (774mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Port Royal. In December, it is snowing for 2 days. Throughout December, 1.26" (32mm) of snow is accumulated. In Port Royal, Virginia, during the entire year, snow falls for 12 days and aggregates up to 6.73" (171mm) of snow.Daylight
December has the shortest days of the year in Port Royal, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 7:07 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:59 pm EST.
Sunshine
The months with the least sunshine in Port Royal, Virginia, are February and December, with an average of 5.1h of sunshine.UV index
The months with the lowest UV index in Port Royal are January, February and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The daily high UV index of 2 during December translates into the following recommendations:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Port Royal, VA
- Average high temperature in December: 47.5°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (42.3°F).
- Average low temperature in December: 35.1°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 (28.8°F).
Average pressure in December
Port Royal, 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
Port Royal, VA
- Average wind speed in December: 6.6mph
The windiest month (with the highest average wind speed) is April (8mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in December
Port Royal, VA
- Average humidity in December: 78%
The months with the highest relative humidity are May and December (78%).
The month with the lowest relative humidity is April (73%).
Average rainfall in December
Port Royal, VA
- Average rainfall in December: 2.44"
The wettest months (with the highest rainfall) are July and August (3.19").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in December
Port Royal, VA
- Average rainfall days in December: 10.7 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (9.4 days).
Average snowfall in December
Port Royal, VA
- Average snowfall in December: 1.26"
The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Port Royal, VA
- Average snowfall days in December: 2 days
The month with the highest number of snowfall days is January (4 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
Port Royal, VA
- Average daylight in December: 9h and 36min
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 36min).
- Average sunshine in December: 5h and 6min
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 6min).
Average sunshine days in December
Port Royal, VA
- Average sunshine days in December: 18.1 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is May (11.9 days).
Average UV index in December
Port Royal, 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 and December (UV index 2).
Average cloud cover in December
Port Royal, VA
- Average cloud cover in December: 44
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Port Royal, VA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
