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
During the shift to December, a minor reduction in average high-temperature is observed, shifting from a cool 55°F (12.8°C) in November to a frosty 46.6°F (8.1°C). Grays's nighttime temperature in December falls to an average of 32.5°F (0.3°C).Humidity
February and December, with an average relative humidity of 79%, are the most humid months.Rainfall
In Grays, during December, the rain falls for 14.2 days and regularly aggregates up to 3.03" (77mm) of precipitation. Throughout the year, there are 186.6 rainfall days, and 33.15" (842mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. The month with the most snowfall is December, when snow falls for 6.6 days and typically aggregates up to 3.5" (89mm) 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 December, sunrise is at 7:24 am and sunset at 5:13 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 5:24 pm EST.
Sunshine
In Grays, the average sunshine in December is 5.2h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. 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: In December, an average UV index of 2 transforms into the following instructions:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures?
What is the most humid month?
What is the average humidity in December?
How many days does it rain in December?
When does it snow the most in Grays?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Grays have in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Grays, VA
- Average high temperature in December: 46.6°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (42.1°F).
- Average low temperature in December: 32.5°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (27.1°F).
Average pressure in December
Grays, VA
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in December
Grays, VA
- Average wind speed in December: 5.6mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in December
Grays, VA
- Average humidity in December: 79%
The months with the highest relative humidity are February and December (79%).
The months with the lowest relative humidity are June, July, August, September and November (75%).
Average rainfall in December
Grays, VA
- Average rainfall in December: 3.03"
The wettest month (with the highest rainfall) is February (3.82").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in December
Grays, VA
- Average rainfall days in December: 14.2 days
The month with the highest number of rainy days is July (19.8 days).
The month with the least rainy days is November (11.6 days).
Average snowfall in December
Grays, VA
- Average snowfall in December: 3.5"
The month with the highest snowfall is December (3.5").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Grays, VA
- Average snowfall days in December: 6.6 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Grays, VA
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in December
Grays, VA
- Average sunshine days in December: 12.8 days
The months with the most sunshine days are October and November (16.3 days).
The month with the least sunshine days is February (9.1 days).
Average UV index in December
Grays, 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
Grays, VA
- Average cloud cover in December: 49
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Grays, VA
- Average visibility in December: 5mi
The months with the highest visibility are April, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March, May and December (5mi).
Grays, Virginia, USA
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