December weather forecastSunny Knoll, VA
December
Weather in December
December, the first month of the winter in Sunny Knoll, is still a chilly month, with temperature in the range of an average low of 32°F (0°C) and an average high of 45.5°F (7.5°C).Temperature
A modest decline in the average high-temperature is seen during December, decreasing from a cool 54°F (12.2°C) in November to a frosty 45.5°F (7.5°C). Throughout the month of December, the average temperature dips to an icy 32°F (0°C) at night.Humidity
The most humid month is December, with an average relative humidity of 78%.Rainfall
In Sunny Knoll, in December, it is raining for 10.5 days, with typically 2.6" (66mm) of accumulated precipitation. In Sunny Knoll, during the entire year, the rain falls for 160.5 days and collects up to 29.92" (760mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. In Sunny Knoll, in December, snow falls for 3.3 days, with typically accumulated 2.13" (54mm) of snow. Throughout the year, there are 20.3 snowfall days, and 13.07" (332mm) 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 7:10 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 5:00 pm EST.
Sunshine
December has the least sunshine of the year in Sunny Knoll, with an average of 5.3h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: During December, 2 as the daily maximum UV index converts into the following advice:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sunny Knoll, VA
- Average high temperature in December: 45.5°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (40.3°F).
- Average low temperature in December: 32°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure in December
Sunny Knoll, 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
Sunny Knoll, VA
- Average wind speed in December: 5.8mph
The windiest months (with the highest average wind speed) are March and April (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in December
Sunny Knoll, VA
- Average humidity in December: 78%
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (72%).
Average rainfall in December
Sunny Knoll, VA
- Average rainfall in December: 2.6"
The wettest month (with the highest rainfall) is August (3.27").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in December
Sunny Knoll, VA
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is November (9.4 days).
Average snowfall in December
Sunny Knoll, VA
- Average snowfall in December: 2.13"
The month with the highest snowfall is January (3.74").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Sunny Knoll, VA
- Average snowfall days in December: 3.3 days
The month with the highest number of snowfall days is January (6.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Sunny Knoll, 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 18min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in December
Sunny Knoll, VA
- Average sunshine days in December: 17 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is July (11.7 days).
Average UV index in December
Sunny Knoll, 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
Sunny Knoll, 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
Sunny Knoll, VA
- Average visibility in December: 5mi
The months with the highest visibility are January, March, April, June, July, August and November (6mi).
The months with the lowest visibility are February, May, September, October and December (5mi).
