December weather forecastMount Jackson, VA
December
Weather in December
The first month of the winter, December, is still a chilly month in Mount Jackson, Virginia, with an average temperature varying between 28.9°F (-1.7°C) and 43.2°F (6.2°C).Temperature
Mount Jackson, Virginia, observes a small decrease in the average high-temperature with the arrival of December, falling from November's fresh 51.3°F (10.7°C) to a frosty 43.2°F (6.2°C). Mount Jackson records an average temperature drop to a subzero cold 28.9°F (-1.7°C) in December.Humidity
In Mount Jackson, the average relative humidity in December is 78%.Rainfall
In Mount Jackson, during December, the rain falls for 9.5 days and regularly aggregates up to 1.61" (41mm) of precipitation. In Mount Jackson, during the entire year, the rain falls for 154 days and collects up to 23.43" (595mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In Mount Jackson, in December, snow falls for 3.5 days, with typically accumulated 2.13" (54mm) of snow. In Mount Jackson, during the entire year, snow falls for 20.9 days and aggregates up to 12.52" (318mm) of snow.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of December in Mount Jackson, sunrise is at 7:14 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 5:03 pm EST.
Sunshine
The month with the least sunshine is December, with an average of 5.1h 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 reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: The UV index of 2 in December translates into these instructions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. 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
Mount Jackson, VA
- Average high temperature in December: 43.2°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in December: 28.9°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (23°F).
Average pressure in December
Mount Jackson, VA
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Mount Jackson, VA
- Average wind speed in December: 5.8mph
The windiest month (with the highest average wind speed) is February (6.9mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in December
Mount Jackson, VA
- Average humidity in December: 78%
The months with the highest relative humidity are September and October (79%).
The months with the lowest relative humidity are January, April, June, July and November (75%).
Average rainfall in December
Mount Jackson, VA
- Average rainfall in December: 1.61"
The wettest month (with the highest rainfall) is May (2.95").
The driest months (with the least rainfall) are January and November (1.3").
Average rainfall days in December
Mount Jackson, VA
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is August (18 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in December
Mount Jackson, VA
- Average snowfall in December: 2.13"
The month with the highest snowfall is February (3.39").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Mount Jackson, VA
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is January (6.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mount Jackson, 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 6min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in December
Mount Jackson, VA
- Average sunshine days in December: 18.2 days
The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (11 days).
Average UV index in December
Mount Jackson, VA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Mount Jackson, VA
- Average cloud cover in December: 45
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Mount Jackson, VA
- Average visibility in December: 5mi
The months with the highest visibility are January, February, April, June, July and November (6mi).
The months with the lowest visibility are March, May, August, September, October and December (5mi).
