Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow. 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. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Infants and people with sensitive skin must always be protected. Note: In December, the average maximum UV index of 2 translate into the following recommendations:įor the majority, extended sun exposure is not of great concern. Thu Dec 30 Moderate rain, high 55☏13☌, low 48☏,9☌,chance of precipitation 86, wind ESE 6 mph,ESE 10 km/h,barometric pressure 29.91 in,1013 mb,visibility 4 mi6 km, humidity 94. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals. Moderate rain, high 51☏10☌, low 45☏,7☌,chance of precipitation 78, wind SE 6 mph,SE 9 km/h,barometric pressure 29.85 in,1011 mb,visibility 3 mi5 km, humidity 92. UV indexJanuary, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. SunshineThe months with the least sunshine in Vienna are January, February and December, with an average of 5.2h of sunshine. Breezy, with a northwest wind 16 to 21 mph decreasing to 9 to 14 mph after midnight. On the last day of the month, sunrise is at 7:27 am and sunset at 4:56 pm EST. On the first day of December, sunrise is at 7:08 am and sunset at 4:47 pm. DaylightDecember has the shortest days of the year in Vienna, with an average of 9h and 29min of daylight. In Vienna, Virginia, during the entire year, snow falls for 18 days and aggregates up to 11.18" (284mm) of snow. In Vienna, Virginia, during 3.1 snowfall days, 1.73" (44mm) of snow is typically accumulated. Snowfall January through April, November and December are months with snowfall in Vienna. ![]() In Vienna, Virginia, during the entire year, the rain falls for 162 days and collects up to 31.65" (804mm) of precipitation. Rainfall In Vienna, during 10.9 rainfall days, 2.72" (69mm) of precipitation is typically accumulated. HumidityThe months with the highest humidity are October and December, with an average relative humidity of 77%. In Vienna, Virginia, in December, the average low-temperature is 32.9☏ (0.5☌). Please reload the page or try again later. TemperatureIn December, the average high-temperature drops from a cool 54.5☏ (12.5☌) in November to a frosty 45.5☏ (7.5☌). Vienna, Virginia 10-Day Weather Forecasts & Weekend Weather WeatherBug 10 Day Weather - Vienna, VA TOP STORIES Failed to load Something went wrong loading the data. Vienna weather forecast for now and the week ahead Expect showers this evening Mostly cloudy and breezy Sunrise 6:12 am Sunset 8:01 pm High: 60 ° Low 45 ° Chance of precipitation: 25. ![]() December, the first month of the winter in Vienna, is still a chilly month, with an average temperature ranging between min 32.9☏ (0.5☌) and max 45.5☏ (7.5☌).
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