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 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
In Arlington, entering December brings a subtle temperature decrement, reducing from November's fresh 54.9°F to a chilly 46°F. Arlington encounters an average low-temperature of 34.2°F during December nights.Humidity
The average relative humidity in December is 75%.Rainfall
In Arlington, Virginia, during December, the rain falls for 10 days and regularly aggregates up to 1.93" of precipitation. Throughout the year, there are 149.1 rainfall days, and 26.14" of precipitation is accumulated.Snowfall
Months with snowfall are January through March and December. December is the first month it typically snows. Throughout December, in the average 1.7 snowfall days, it receives 0.79" of snow. In Arlington, during the entire year, snow falls for 11.7 days and aggregates up to 6.3" of snow.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:07 am and sunset at 4:47 pm. On the last day of December, sunrise is at 7:26 am and sunset at 4:56 pm EST.
Sunshine
The months with the least sunshine in Arlington are January, February and December, with an average of 5.1h of sunshine.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
FAQ
What is the average December temperature in Arlington?
What is the average humidity in December in Arlington?
How much does it rain in Arlington in December?
When does it start to snow in Arlington?
What is the month with the shortest days in Arlington?
What is the average length of the day in December in Arlington?
When is the sunrise / sunset in December in Arlington?
What is the month with the least sunshine in Arlington?
How long on average sun shines in December in Arlington?
What are the months with the lowest UV index in Arlington?
What is the UV index intensity in December in Arlington?
Average temperature in December
Arlington, VA
- Average high temperature in December: 46°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (40.6°F).
- Average low temperature in December: 34.2°F
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).
Average pressure in December
Arlington, 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
Arlington, VA
- Average wind speed in December: 7mph
The windiest month (with the highest average wind speed) is March (7.9mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Arlington, VA
- Average humidity in December: 75%
The month with the highest relative humidity is May (76%).
The months with the lowest relative humidity are April and July (71%).
Average rainfall in December
Arlington, VA
- Average rainfall in December: 1.93"
The wettest month (with the highest rainfall) is August (3.46").
The driest month (with the least rainfall) is January (1.57").
Average rainfall days in December
Arlington, VA
- Average rainfall days in December: 10 days
The month with the highest number of rainy days is July (16.4 days).
The month with the least rainy days is November (8.1 days).
Average snowfall in December
Arlington, VA
- Average snowfall in December: 0.79"
The month with the highest snowfall is January (2.17").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Arlington, VA
- Average snowfall days in December: 1.7 days
The months with the highest number of snowfall days are January and February (3.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Arlington, 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 42min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 6min).
Average sunshine days in December
Arlington, VA
- Average sunshine days in December: 19 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (12.8 days).
Average UV index in December
Arlington, VA
- Average UV index in December: 2
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in December
Arlington, VA
- Average cloud cover in December: 45
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in December
Arlington, 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).
Arlington, Virginia, USA
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