December weather forecastClifton, VA
December
Weather in December
December in Clifton, Virginia, is a fierce display of winter in its full glory, concluding the year on a chilly note. The city sees an increased coverage of snow with an average of 1.57" (40mm) of snowfall. Comparing December with the preceding November, there is a clear indication of a marked increase in snow occurrences and lower temperature ranges. Residents gear up for the holiday season against this chilly December backdrop, with festive lights twinkling against the pale winter snow. Despite the biting cold, December is a sight to behold, with its transformed winter wonderland aura and spectacles of the holiday season wrapped in wintry charm.Temperature
The shift from November to December includes a minor decrease in the average high-temperature, lightly dropping from a fresh 54.5°F (12.5°C) to a frosty 45.7°F (7.6°C). During the December nights, an average temperature of 32.9°F (0.5°C) is observed.Humidity
October and December, with an average relative humidity of 77%, are the most humid months.Rainfall
In Clifton, in December, during 10.8 rainfall days, 2.76" (70mm) of precipitation is typically accumulated. Throughout the year, in Clifton, there are 166.5 rainfall days, and 32.76" (832mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In Clifton, during December, snow falls for 2.4 days and regularly aggregates up to 1.57" (40mm) of snow. Throughout the year, there are 16.2 snowfall days, and 10.79" (274mm) of snow is accumulated.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:09 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:58 pm EST.
Sunshine
The months with the least sunshine are January, February and December, with an average of 5.2h of sunshine.UV index
January, February, 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 the average person.Note: A maximum daily UV index of 2 during December morphs into the following directions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Clifton, VA
- Average high temperature in December: 45.7°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (40.5°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).
Average pressure in December
Clifton, 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
Clifton, VA
- Average wind speed in December: 6.4mph
The windiest month (with the highest average wind speed) is March (7.4mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).
Average humidity in December
Clifton, 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 (71%).
Average rainfall in December
Clifton, VA
- Average rainfall in December: 2.76"
The wettest month (with the highest rainfall) is August (3.94").
The driest month (with the least rainfall) is January (2.09").
Average rainfall days in December
Clifton, VA
- Average rainfall days in December: 10.8 days
The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is November (9.3 days).
Average snowfall in December
Clifton, VA
- Average snowfall in December: 1.57"
The month with the highest snowfall is January (3.58").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Clifton, VA
- Average snowfall days in December: 2.4 days
The month with the highest number of snowfall days is January (5.2 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
Clifton, VA
- Average daylight in December: 9h and 30min
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 12min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 12min).
Average sunshine days in December
Clifton, VA
- Average sunshine days in December: 16.8 days
The month with the most sunshine days is November (19.3 days).
The months with the least sunshine days are May and July (10.5 days).
Average UV index in December
Clifton, 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, November and December (UV index 2).
Average cloud cover in December
Clifton, 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
Clifton, 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).
