December weather forecastRoswell, GA
December
Weather in December
December concludes the year quietly in Roswell, rolling back into winter. Temperatures plummet further with an average high temperature of 53.4°F (11.9°C). The festive spirit fills the town, with brightly lit streets and decorated homes. A minor snowfall of 0.71" (18mm) typically takes place, adding a touch of white to the city’s aesthetics. Despite shorter daylight hours of 9.9 hours, the magic of holiday season keeps the city vibrant and lively.Temperature
The commencement of December indicates a gentle shift in the average high-temperature, receding from November's comfortable 60.8°F (16°C) to a cool 53.4°F (11.9°C). The average temperature during December nights dips to a wintry 39°F (3.9°C).Humidity
December is the most humid month, with an average relative humidity of 77%.Rainfall
In December, the rain falls for 13.8 days. Throughout December, 3.82" (97mm) of precipitation is accumulated. In Roswell, during the entire year, the rain falls for 183.1 days and collects up to 45.12" (1146mm) of precipitation.Snowfall
January through March, November and December are months with snowfall in Roswell, Georgia. In Roswell, in December, snow falls for 0.6 days, with typically accumulated 0.71" (18mm) of snow. In Roswell, Georgia, during the entire year, snow falls for 4.2 days and aggregates up to 2.95" (75mm) of snow.Daylight
With an average of 9h and 54min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:25 am and sunset at 5:28 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 5:38 pm EST.
Sunshine
December has the least sunshine of the year in Roswell, with an average of 5h of sunshine.UV index
The month with the lowest UV index is December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 2 during December leads to these advisories:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Roswell, GA
- Average high temperature in December: 53.4°F
The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (49.3°F).
- Average low temperature in December: 39°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 (34.2°F).
Average pressure in December
Roswell, 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
Roswell, GA
- Average wind speed in December: 7.4mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in December
Roswell, GA
- Average humidity in December: 77%
The month with the highest relative humidity is December (77%).
The months with the lowest relative humidity are July and August (68%).
Average rainfall in December
Roswell, GA
- Average rainfall in December: 3.82"
The wettest month (with the highest rainfall) is August (5.55").
The driest month (with the least rainfall) is October (2.36").
Average rainfall days in December
Roswell, GA
- Average rainfall days in December: 13.8 days
The month with the highest number of rainy days is July (20.8 days).
The months with the least rainy days are October and November (10.3 days).
Average snowfall in December
Roswell, GA
- Average snowfall in December: 0.71"
The month with the highest snowfall is January (1.18").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Roswell, GA
- Average snowfall days in December: 0.6 days
The month with the highest number of snowfall days is January (1.5 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
Roswell, GA
- Average daylight in December: 9h and 54min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in December
Roswell, GA
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is October (19.1 days).
The month with the least sunshine days is July (8 days).
Average UV index in December
Roswell, GA
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in December
Roswell, GA
- Average cloud cover in December: 47
The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in December
Roswell, 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).
