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
Transition into December subtly marks a drop in the average high-temperature, moderately moving from a fresh 54.9°F (12.7°C) in November to a chilly 46.6°F (8.1°C). Dale City's average low-temperature for the month of December records at an icy 33.3°F (0.7°C).Humidity
The months with the highest humidity are October and December, with an average relative humidity of 77%.Rainfall
In Dale City, during December, the rain falls for 6.7 days and regularly aggregates up to 0.63" (16mm) of precipitation. Throughout the year, there are 105.2 rainfall days, and 9.21" (234mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In Dale City, during December, snow falls for 1.6 days and regularly aggregates up to 0.31" (8mm) of snow. Throughout the year, in Dale City, there are 10.6 snowfall days, and 2.24" (57mm) of snow is accumulated.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 7:08 am and sunset at 4:48 pm. On the last day of December, sunrise is at 7:26 am and sunset at 4:58 pm EST.
Sunshine
February and December, with an average of 5.2h of sunshine, are months with the least sunshine.UV index
January, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the average person.Note: A typical high UV index of 2 in December suggests the following recommendations:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December?
What is the most humid month?
What is the average humidity in December?
How many days does it rain in December in Dale City?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Dale City have in December?
What time are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Dale City have in December?
When is the lowest UV index in Dale City?
How high is the UV index in December?
Average temperature in December
Dale City, VA
- Average high temperature in December: 46.6°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (41°F).
- Average low temperature in December: 33.3°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (27°F).
Average pressure in December
Dale City, 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
Dale City, VA
- Average wind speed in December: 6.1mph
The windiest months (with the highest average wind speed) are March and April (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in December
Dale City, VA
- Average humidity in December: 77%
The months with the highest relative humidity are October and December (77%).
The month with the lowest relative humidity is July (72%).
Average rainfall in December
Dale City, VA
- Average rainfall in December: 0.63"
The wettest month (with the highest rainfall) is August (1.18").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in December
Dale City, VA
- Average rainfall days in December: 6.7 days
The month with the highest number of rainy days is May (11.7 days).
The month with the least rainy days is November (5.5 days).
Average snowfall in December
Dale City, VA
- Average snowfall in December: 0.31"
The month with the highest snowfall is January (0.83").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Dale City, VA
- Average snowfall days in December: 1.6 days
The month with the highest number of snowfall days is February (3.3 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
Dale City, 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 48min).
The months with the least sunshine are February and December (Average sunshine: 5h and 12min).
Average sunshine days in December
Dale City, VA
- Average sunshine days in December: 22.2 days
The month with the most sunshine days is November (23.1 days).
The month with the least sunshine days is May (16.9 days).
Average UV index in December
Dale City, 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, November and December (UV index 2).
Average cloud cover in December
Dale City, 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 30).
Average visibility in December
Dale City, 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).
Dale City, Virginia, USA
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