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
Welcoming December, Grantsville observes a shift in the average high-temperature, falling from November's chilly 48.4°F (9.1°C) to a wintry 38.8°F (3.8°C). Grantsville throughout December, records an average low-temperature of 27.3°F (-2.6°C).Humidity
The average relative humidity in December is 82%.Rainfall
In Grantsville, Maryland, during December, the rain falls for 14.1 days and regularly aggregates up to 2.87" (73mm) of precipitation. Throughout the year, in Grantsville, there are 186.2 rainfall days, and 31.93" (811mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Grantsville, during December, snow falls for 10.8 days and regularly aggregates up to 4.13" (105mm) of snow. In Grantsville, during the entire year, snow falls for 56.7 days and aggregates up to 28.46" (723mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of December in Grantsville, sunrise is at 7:19 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 5:02 pm EST.
Sunshine
The average sunshine in December in Grantsville is 4.6h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Grantsville. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 2 in December translates into this advice:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Frequently asked questions
Is December cold in Grantsville?
What is the average humidity in December in Grantsville?
How many days does it rain in December in Grantsville?
How many days does it snow in December in Grantsville?
What is the month with the shortest days in Grantsville?
How many hours of daylight does Grantsville have in December?
When is the sunrise / sunset in December in Grantsville?
How many hours of sunshine does Grantsville have in December?
What is the month with the lowest UV index in Grantsville?
How high is the UV index in December in Grantsville?
Average temperature in December
Grantsville, MD
- Average high temperature in December: 38.8°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (33.3°F).
- Average low temperature in December: 27.3°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in December
Grantsville, MD
- 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
Grantsville, MD
- Average wind speed in December: 7.8mph
The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in December
Grantsville, MD
- Average humidity in December: 82%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is July (76%).
Average rainfall in December
Grantsville, MD
- Average rainfall in December: 2.87"
The wettest month (with the highest rainfall) is May (3.46").
The driest month (with the least rainfall) is November (1.85").
Average rainfall days in December
Grantsville, MD
- Average rainfall days in December: 14.1 days
The month with the highest number of rainy days is May (21.3 days).
The month with the least rainy days is November (11.1 days).
Average snowfall in December
Grantsville, MD
- Average snowfall in December: 4.13"
The month with the highest snowfall is February (6.85").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Grantsville, MD
- Average snowfall days in December: 10.8 days
The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Grantsville, MD
- 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: 4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in December
Grantsville, MD
- Average sunshine days in December: 11.5 days
The month with the most sunshine days is November (15.4 days).
The month with the least sunshine days is May (6.8 days).
Average UV index in December
Grantsville, MD
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Grantsville, MD
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in December
Grantsville, MD
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Grantsville, Maryland, USA
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