December weather forecastKeysville, VA
December
Weather in December
The first month of the winter, December, is still a chilly month in Keysville, Virginia, with temperature in the range of an average low of 34.7°F (1.5°C) and an average high of 49.1°F (9.5°C).Temperature
The transition into December subtly indicates a reduction in the average high-temperature, down to a chilly 49.1°F (9.5°C) from November's refreshing 56.3°F (13.5°C). During December, Keysville's temperature averages to an icy 34.7°F (1.5°C) at night.Humidity
December is the most humid month, with an average relative humidity of 78%.Rainfall
In Keysville, Virginia, during December, the rain falls for 10.5 days and regularly aggregates up to 2.64" (67mm) of precipitation. Throughout the year, in Keysville, there are 156.1 rainfall days, and 30" (762mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. In December, it is snowing for 1.3 days. Throughout December, 1.77" (45mm) of snow is accumulated. In Keysville, Virginia, during the entire year, snow falls for 10.8 days and aggregates up to 9.17" (233mm) of snow.Daylight
With an average of 9h and 42min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:09 am and sunset at 4:57 pm. On the last day of December, in Keysville, sunrise is at 7:27 am and sunset at 5:07 pm EST.
Sunshine
The month with the least sunshine in Keysville is December, with an average of 5.4h of sunshine.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Keysville. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: In December, the maximum UV index of 2 suggests this advice:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Keysville, VA
- Average high temperature in December: 49.1°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (44.6°F).
- Average low temperature in December: 34.7°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (29.1°F).
Average pressure in December
Keysville, VA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Keysville, VA
- Average wind speed in December: 5.8mph
The windiest month (with the highest average wind speed) is April (7.2mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Keysville, 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 (69%).
Average rainfall in December
Keysville, VA
- Average rainfall in December: 2.64"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days in December
Keysville, VA
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is November (9 days).
Average snowfall in December
Keysville, VA
- Average snowfall in December: 1.77"
The month with the highest snowfall is March (2.52").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Keysville, VA
- Average snowfall days in December: 1.3 days
The month with the highest number of snowfall days is February (3.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Keysville, VA
- Average daylight in December: 9h and 42min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 5h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in December
Keysville, VA
- Average sunshine days in December: 18.6 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in December
Keysville, 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 and December (UV index 2).
Average cloud cover in December
Keysville, VA
- Average cloud cover in December: 42
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Keysville, VA
- Average visibility in December: 5mi
The months with the highest visibility are February, March, April, June, July, August, October and November (6mi).
The months with the lowest visibility are January, May, September and December (5mi).
