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 December, the average high-temperature marginally drops from a cool 54.9°F (12.7°C) in November to a chilly 46.6°F (8.1°C). Throughout December, Dale City witnesses a consistent average low-temperature of 33.3°F (0.7°C).Humidity
October and December, with an average relative humidity of 77%, are the most humid months in Dale City.Rainfall
In December, the rain falls for 6.7 days. Throughout December, 0.63" (16mm) of precipitation is accumulated. In Dale City, during the entire year, the rain falls for 105.2 days and collects up to 9.21" (234mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In December, it is snowing for 1.6 days. Throughout December, 0.31" (8mm) of snow is accumulated. Throughout the year, there are 10.6 snowfall days, and 2.24" (57mm) of snow is accumulated.Daylight
The month with the shortest days in Dale City is December, 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, in Dale City, sunrise is at 7:26 am and sunset at 4:58 pm EST.
Sunshine
The months with the least sunshine in Dale City are February and December, with an average of 5.2h of 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 estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 2 in December translates into these instructions:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. To protect against the Sun's most potent rays, avoid direct exposure around midday. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Frequently asked questions
What is the usual temperature for Dale City in December?
What is the most humid month in Dale City?
What is the average humidity in December in Dale City?
How much does it rain in Dale City in December?
How many days does it snow in December in Dale City?
What is the month with the shortest days in Dale City?
What is the average length of the day in December in Dale City?
When is the sunrise / sunset in December in Dale City?
What is the month with the least sunshine in Dale City?
How many hours of sunshine does Dale City have in December?
What are the months with the lowest UV index in Dale City?
How high is the UV index in December in Dale City?
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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