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
With the arrival of December, West Falls Church experiences a modest decline in average high-temperatures, transitioning from a cool 54.1°F (12.3°C) in November to a chilly 45.5°F (7.5°C). West Falls Church experiences an average low-temperature reading of 33.1°F (0.6°C) throughout December.Humidity
October and December, with an average relative humidity of 76%, are the most humid months.Rainfall
In December, the rain falls for 6.9 days. Throughout December, 0.67" (17mm) of precipitation is accumulated. Throughout the year, there are 109 rainfall days, and 9.29" (236mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In West Falls Church, Virginia, during December, snow falls for 1.2 days and regularly aggregates up to 0.28" (7mm) of snow. Throughout the year, there are 10.3 snowfall days, and 2.28" (58mm) 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 4:47 pm. On the last day of December, sunrise is at 7:27 am and sunset at 4:57 pm EST.
Sunshine
February and December, with an average of 5.1h 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 of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 2 during December translates into the following guidance:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in December?
What is the most humid month in West Falls Church?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
What are the months with the least sunshine in West Falls Church?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
West Falls Church, VA
- Average high temperature in December: 45.5°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 (40.1°F).
- Average low temperature in December: 33.1°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 (26.8°F).
Average pressure in December
West Falls Church, 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
West Falls Church, VA
- Average wind speed in December: 6.8mph
The windiest month (with the highest average wind speed) is March (7.7mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in December
West Falls Church, VA
- Average humidity in December: 76%
The months with the highest relative humidity are October and December (76%).
The month with the lowest relative humidity is July (70%).
Average rainfall in December
West Falls Church, VA
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is August (1.5").
The driest months (with the least rainfall) are January and September (0.51").
Average rainfall days in December
West Falls Church, VA
- Average rainfall days in December: 6.9 days
The month with the highest number of rainy days is July (13.5 days).
The month with the least rainy days is November (5.6 days).
Average snowfall in December
West Falls Church, VA
- Average snowfall in December: 0.28"
The month with the highest snowfall is January (0.98").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
West Falls Church, VA
- Average snowfall days in December: 1.2 days
The month with the highest number of snowfall days is February (3.6 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
West Falls Church, 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 54min).
The months with the least sunshine are February and December (Average sunshine: 5h and 6min).
Average sunshine days in December
West Falls Church, VA
- Average sunshine days in December: 22 days
The month with the most sunshine days is November (23 days).
The month with the least sunshine days is July (14.3 days).
Average UV index in December
West Falls Church, 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
West Falls Church, 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
West Falls Church, 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).
West Falls Church, Virginia, USA
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