December weather forecastGrantsville, WV
December
Weather in December
The first month of the winter, December, is still a chilly month in Grantsville, West Virginia, with an average temperature varying between 43°F (6.1°C) and 31.1°F (-0.5°C).Temperature
Grantsville's December weather comes with a decrease in average high-temperatures, moving from a cool 52°F (11.1°C) in November to a chilly 43°F (6.1°C). In Grantsville, the nighttime temperature averages to a subzero cold 31.1°F (-0.5°C) during December.Humidity
In Grantsville, the average relative humidity in December is 82%.Rainfall
In Grantsville, in December, during 13.7 rainfall days, 3.27" (83mm) of precipitation is typically accumulated. In Grantsville, during the entire year, the rain falls for 189.9 days and collects up to 38.19" (970mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Grantsville, in December, snow falls for 10.5 days, with typically accumulated 3.98" (101mm) of snow. Throughout the year, there are 51.3 snowfall days, and 21.93" (557mm) 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 7:24 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 5:12 pm EST.
Sunshine
In Grantsville, the average sunshine in December is 3.9h.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 2 in December converts into the following recommendations:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Grantsville, WV
- Average high temperature in December: 43°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in December: 31.1°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in December
Grantsville, WV
- 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
Grantsville, WV
- Average wind speed in December: 6mph
The windiest months (with the highest average wind speed) are January and February (6.6mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in December
Grantsville, WV
- Average humidity in December: 82%
The months with the highest relative humidity are January and February (83%).
The months with the lowest relative humidity are June, July, August and November (77%).
Average rainfall in December
Grantsville, WV
- Average rainfall in December: 3.27"
The wettest month (with the highest rainfall) is May (4.61").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in December
Grantsville, WV
- Average rainfall days in December: 13.7 days
The month with the highest number of rainy days is May (20.9 days).
The month with the least rainy days is November (11.7 days).
Average snowfall in December
Grantsville, WV
- Average snowfall in December: 3.98"
The month with the highest snowfall is January (6.22").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Grantsville, WV
- Average snowfall days in December: 10.5 days
The month with the highest number of snowfall days is January (15.4 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
Grantsville, WV
- Average daylight in December: 9h and 30min
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 30min).
- Average sunshine in December: 3h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in December
Grantsville, WV
- Average sunshine days in December: 10 days
The month with the most sunshine days is October (15 days).
The month with the least sunshine days is January (7.9 days).
Average UV index in December
Grantsville, WV
- Average UV index in December: 2
The months with the highest UV index are 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
Grantsville, WV
- Average cloud cover in December: 62
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
Grantsville, WV
- Average visibility in December: 5mi
The months with the highest visibility are April and November (6mi).
The month with the lowest visibility is January (4mi).
