Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December is characterized by a reduction in the average high-temperature, from a cool 52°F (11.1°C) in November to a chilly 42.8°F (6°C). The nighttime temperature, during December, averages of 30.4°F (-0.9°C).Humidity
May, October and December, with an average relative humidity of 78%, are the most humid months in Shepherdstown.Rainfall
In Shepherdstown, in December, during 10.3 rainfall days, 2.48" (63mm) of precipitation is typically accumulated. Throughout the year, there are 169.2 rainfall days, and 32.6" (828mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, November and December. In Shepherdstown, in December, during 4.3 snowfall days, 2.8" (71mm) of snow is typically accumulated. Throughout the year, in Shepherdstown, there are 22.7 snowfall days, and 14.21" (361mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year in Shepherdstown.On the first day of the month, sunrise is at 7:12 am and sunset at 4:48 pm. On the last day of December, in Shepherdstown, sunrise is at 7:31 am and sunset at 4:57 pm EST.
Sunshine
In December, the average sunshine in Shepherdstown is 5h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Shepherdstown, West Virginia. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The daily maximum UV index of 2 in December interprets into the following advice:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Frequently asked questions
How cold is December in Shepherdstown?
What is the most humid month in Shepherdstown?
What is the average humidity in December in Shepherdstown?
How much does it rain in Shepherdstown in December?
How many days does it snow in December in Shepherdstown?
What is the month with the shortest days in Shepherdstown?
What is the average length of the day in December in Shepherdstown?
When is the sunrise / sunset in December in Shepherdstown?
How many hours of sunshine does Shepherdstown have in December?
When is the lowest UV index in Shepherdstown?
What is the UV index reading in December in Shepherdstown?
Average temperature in December
Shepherdstown, WV
- Average high temperature in December: 42.8°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in December: 30.4°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in December
Shepherdstown, WV
- 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
Shepherdstown, WV
- Average wind speed in December: 6.6mph
The windiest months (with the highest average wind speed) are January, February, March and April (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in December
Shepherdstown, WV
- Average humidity in December: 78%
The months with the highest relative humidity are May, October and December (78%).
The months with the lowest relative humidity are April and July (74%).
Average rainfall in December
Shepherdstown, WV
- Average rainfall in December: 2.48"
The wettest months (with the highest rainfall) are May and July (3.54").
The driest month (with the least rainfall) is January (2.13").
Average rainfall days in December
Shepherdstown, WV
- Average rainfall days in December: 10.3 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (9.1 days).
Average snowfall in December
Shepherdstown, WV
- Average snowfall in December: 2.8"
The month with the highest snowfall is January (3.86").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Shepherdstown, WV
- Average snowfall days in December: 4.3 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Shepherdstown, WV
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in December
Shepherdstown, WV
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is May (9.9 days).
Average UV index in December
Shepherdstown, WV
- 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
Shepherdstown, WV
- Average cloud cover in December: 48
The months with the most cloud cover are March and December (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Shepherdstown, WV
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, November and December (6mi).
The months with the lowest visibility are May, September and October (5mi).
Shepherdstown, West Virginia, USA
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