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
The shift from November to December involves a decrease in the average high-temperature, from a cool 52°F (11.1°C) to a frosty 43°F (6.1°C). During the nights in December, Grantsville experiences a consistent average temperature of 31.1°F (-0.5°C).Humidity
In Grantsville, the average relative humidity in December is 82%.Rainfall
In Grantsville, in December, it is raining for 13.7 days, with typically 3.27" (83mm) of accumulated precipitation. 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 in Grantsville are January through April, October through December. In Grantsville, West Virginia, in December, during 10.5 snowfall days, 3.98" (101mm) of snow is typically accumulated. In Grantsville, during the entire year, snow falls for 51.3 days and aggregates up to 21.93" (557mm) of snow.Daylight
The month with the shortest days in Grantsville is December, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:24 am and sunset at 5:02 pm. On the last day of December, 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 value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 2 translates into these guidelines:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Frequently asked questions
Is it cold in Grantsville during December?
What is the average humidity in December in Grantsville?
How many days does it rain in December in Grantsville?
How much does it snow in Grantsville in December?
What is the month with the shortest days in Grantsville?
What is the average length of the day in December in Grantsville?
When is the sunrise / sunset in December in Grantsville?
How long on average sun shines in December in Grantsville?
What are the months with the lowest UV index in Grantsville?
How high is the UV index in December in Grantsville?
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 3min
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 5min
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).
Grantsville, West Virginia, USA
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