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 ushers in a minute temperature change, with average high-temperatures reducing from November's refreshing 55.8°F (13.2°C) to a frosty 47.8°F (8.8°C). The low-temperature average for Gretna during December stands at a wintry 34°F (1.1°C).Humidity
May and December, with an average relative humidity of 76%, are the most humid months in Gretna, Virginia.Rainfall
In Gretna, during December, the rain falls for 10.3 days and regularly aggregates up to 2.68" (68mm) of precipitation. Throughout the year, in Gretna, there are 158.8 rainfall days, and 30.91" (785mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In Gretna, in December, during 1.4 snowfall days, 2.05" (52mm) of snow is typically accumulated. Throughout the year, in Gretna, there are 11.8 snowfall days, and 10.2" (259mm) of snow is accumulated.Daylight
With an average of 9h and 42min of daylight, December has the shortest days of the year in Gretna, Virginia.On the first day of December in Gretna, sunrise is at 7:12 am and sunset at 5:00 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 5:11 pm EST.
Sunshine
The average sunshine in December in Gretna, Virginia, is 5.4h.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 minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: A daily maximum UV index of 2 in December translates into the following instructions:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Gretna?
What is the most humid month in Gretna?
What is the average humidity in December in Gretna?
How many days does it rain in December in Gretna?
How many days does it snow in December in Gretna?
What is the month with the shortest days in Gretna?
What is the average length of the day in December in Gretna?
When are sunrise and sunset in December in Gretna?
How long on average sun shines in December in Gretna?
What are the months with the lowest UV index in Gretna?
How high is the UV index in December in Gretna?
Average temperature in December
Gretna, VA
- Average high temperature in December: 47.8°F
The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (43.3°F).
- Average low temperature in December: 34°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).
Average pressure in December
Gretna, 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 (29.97"Hg).
Average wind speed in December
Gretna, VA
- Average wind speed in December: 6.3mph
The windiest months (with the highest average wind speed) are February and April (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in December
Gretna, VA
- Average humidity in December: 76%
The months with the highest relative humidity are May and December (76%).
The month with the lowest relative humidity is July (69%).
Average rainfall in December
Gretna, VA
- Average rainfall in December: 2.68"
The wettest month (with the highest rainfall) is May (3.82").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in December
Gretna, VA
- Average rainfall days in December: 10.3 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in December
Gretna, VA
- Average snowfall in December: 2.05"
The month with the highest snowfall is February (3.19").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Gretna, VA
- Average snowfall days in December: 1.4 days
The month with the highest number of snowfall days is February (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
Gretna, VA
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 5h and 2min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in December
Gretna, VA
- Average sunshine days in December: 18.8 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is May (10.9 days).
Average UV index in December
Gretna, 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
Gretna, VA
- Average cloud cover in December: 42
The months with the most cloud cover are February and March (Cloud cover 44).
The months with the least cloud cover are June and July (Cloud cover 31).
Average visibility in December
Gretna, VA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Gretna, Virginia, USA
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