December weather forecastStone Mountain, GA
December
Weather in December
The first month of the winter, December, is also a fresh month in Stone Mountain, Georgia, with an average temperature fluctuating between 39.7°F (4.3°C) and 53.8°F (12.1°C).Temperature
With the onset of December, Stone Mountain's climate undergoes a slight change as the average high-temperature moves from an enjoyable 61.3°F (16.3°C) in November to a cool 53.8°F (12.1°C). Stone Mountain reports an average low-temperature of 39.7°F (4.3°C) during the nights of December.Humidity
With an average relative humidity of 77%, December is the most humid month.Rainfall
In Stone Mountain, in December, it is raining for 13.3 days, with typically 3.7" (94mm) of accumulated precipitation. Throughout the year, there are 182.9 rainfall days, and 40.39" (1026mm) of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall. In Stone Mountain, in December, snow falls for 0.3 days, with typically accumulated 0.12" (3mm) of snow. In Stone Mountain, during the entire year, snow falls for 2.4 days and aggregates up to 1.5" (38mm) of snow.Daylight
December has the shortest days of the year, with an average of 10h and 0min of daylight.On the first day of December, sunrise is at 7:24 am and sunset at 5:27 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 5:38 pm EST.
Sunshine
With an average of 5.1h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Stone Mountain, GA
- Average high temperature in December: 53.8°F
The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (50.5°F).
- Average low temperature in December: 39.7°F
The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (35.2°F).
Average pressure in December
Stone Mountain, GA
- Average pressure in December: 30.15"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in December
Stone Mountain, GA
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in December
Stone Mountain, GA
- Average humidity in December: 77%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (70%).
Average rainfall in December
Stone Mountain, GA
- Average rainfall in December: 3.7"
The wettest month (with the highest rainfall) is August (5.35").
The driest month (with the least rainfall) is October (2.2").
Average rainfall days in December
Stone Mountain, GA
- Average rainfall days in December: 13.3 days
The month with the highest number of rainy days is July (22.6 days).
The month with the least rainy days is November (9.9 days).
Average snowfall in December
Stone Mountain, GA
- Average snowfall in December: 0.12"
The month with the highest snowfall is February (0.71").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Stone Mountain, GA
- Average snowfall days in December: 0.3 days
The month with the highest number of snowfall days is January (0.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Stone Mountain, GA
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 5h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in December
Stone Mountain, GA
- Average sunshine days in December: 15.9 days
The month with the most sunshine days is October (20.1 days).
The month with the least sunshine days is July (6.9 days).
Average UV index in December
Stone Mountain, GA
- 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 and December (UV index 2).
Average cloud cover in December
Stone Mountain, GA
- Average cloud cover in December: 45
The months with the most cloud cover are February and December (Cloud cover 45).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in December
Stone Mountain, GA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
