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
A mild drop in Dahlgren's average high-temperature is observed in December, transitioning from a moderate 55.8°F (13.2°C) in November to a chilly 47.5°F (8.6°C). Dahlgren observes an average low-temperature of 35.1°F (1.7°C) during December nights.Humidity
May and December, with an average relative humidity of 78%, are the most humid months.Rainfall
In Dahlgren, during December, the rain falls for 10.7 days and regularly aggregates up to 2.44" (62mm) of precipitation. Throughout the year, in Dahlgren, there are 158.1 rainfall days, and 30.47" (774mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Dahlgren. In December, in Dahlgren, Virginia, it is snowing for 2 days. Throughout December, 1.26" (32mm) of snow is accumulated. Throughout the year, in Dahlgren, there are 12 snowfall days, and 6.73" (171mm) of snow is accumulated.Ocean temperature
In December, the average ocean temperature in Dahlgren is 52.5°F (11.4°C).Note: Diving into 52.5°F (11.4°C) when it's under 50°F (10°C) can cause immediate cold shock symptoms, marked by hyperventilation.
Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:06 am and sunset at 4:48 pm. On the last day of December, sunrise is at 7:25 am and sunset at 4:58 pm EST.
Sunshine
The months with the least sunshine in Dahlgren, Virginia, are February and December, with an average of 5.1h of sunshine.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Dahlgren in December?
What are the most humid months in Dahlgren?
What is the average humidity in December in Dahlgren?
How much does it rain in Dahlgren in December?
How many days does it snow in December in Dahlgren?
What is the ocean temperature in December in Dahlgren?
What is the month with the shortest days in Dahlgren?
How many hours of daylight does Dahlgren have in December?
What time are sunrise and sunset in December in Dahlgren?
What is the month with the least sunshine in Dahlgren?
How many hours of sunshine does Dahlgren have in December?
What are the months with the lowest UV index in Dahlgren?
What is the UV index intensity in December in Dahlgren?
Average temperature in December
Dahlgren, 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
Dahlgren, 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
Dahlgren, 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
Dahlgren, 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
Dahlgren, 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
Dahlgren, 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
Dahlgren, 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
Dahlgren, 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 sea temperature in December
Dahlgren, VA
- Average sea temperature in December: 52.6°F
The best month for swimming (with the highest average sea temperature) is August (78.4°F).
The coldest month (with the lowest average sea temperature) is February (46.7°F).
Average daylight in December /
Average sunshine in December
Dahlgren, VA
- Average daylight in December: 9h and 3min
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 30min).
- Average sunshine in December: 5h and 1min
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
Dahlgren, 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
Dahlgren, 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
Dahlgren, 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
Dahlgren, 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).
Dahlgren, Virginia, USA
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