December weather forecast and climate
Atlanta, GA

Beautiful sky and cityscape of Atlanta in Georgia, USA
Beautiful sky and cityscape of Atlanta in Georgia, USA

Weather in December

December, the first month of the winter, in Atlanta, is still a cool month, with temperature in the range of an average high of 53.8°F (12.1°C) and an average low of 39.7°F (4.3°C).

Temperature

In December, the average high-temperature marginally drops, from a comfortable 61.3°F (16.3°C) in November, to a fresh 53.8°F (12.1°C). The average low-temperature, in Atlanta, is 39.7°F (4.3°C).

Humidity

With an average relative humidity of 77%, December is the most humid month.

Rainfall

In December, the rain falls for 9.5 days. Throughout December, 1.3" (33mm) of precipitation is accumulated. In Atlanta, Georgia, during the entire year, the rain falls for 134.6 days and collects up to 14.72" (374mm) of precipitation.

Snowfall

Months with snowfall in Atlanta, Georgia, are January through March and December. December is the first month it typically snows. Throughout December, in the average 0.3 snowfall days, it receives 0.12" (3mm) of snow. In Atlanta, during the entire year, snow falls for 2.3 days, and aggregates up to 0.59" (15mm) of snow.

Daylight

With an average of 9.9h of daylight, December has the shortest days of the year.

Sunshine

The month with the least sunshine is December, with an average of 5.1h of sunshine.

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 2 in December transform into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Atlanta?

In Atlanta, in December, the average high-temperature is 53.8°F (12.1°C), and the average low-temperature is 39.7°F (4.3°C).

What is the most humid month in Atlanta?

With an average relative humidity of 77%, December is the most humid month.

What is the average humidity in December in Atlanta?

The average relative humidity in December in Atlanta, Georgia, is 77%.

How much does it rain in Atlanta in December?

In Atlanta, in December, it is raining for 9.5 days, with typically 1.3" (33mm) of accumulated precipitation.

When does it start snowing in Atlanta?

December is the first month it typically snows. Throughout December, in the average 0.3 snowfall days, it receives 0.12" (3mm) of snow.

What is the month with the shortest days in Atlanta?

The month with the shortest days in Atlanta is December, with an average of 9.9h of daylight.

How many hours of daylight does Atlanta have in December?

In Atlanta, Georgia, the average length of the day in December is 9.9h.

What is the month with the least sunshine in Atlanta?

December has the least sunshine of the year, with an average of 5.1h of sunshine.

How long on average sun shines in December in Atlanta?

In December, the average sunshine in Atlanta, Georgia, is 5.1h.

When is the lowest UV index in Atlanta?

January and December, with an average maximum UV index of 2, are months with the lowest UV index in Atlanta.

How high is the UV index in December in Atlanta?

In Atlanta, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV radiation.

Average temperature in December
Atlanta, GA

Average temperature in December - Atlanta, GA
  • Average high temperature in December: 12.1°C

The warmest month (with the highest average high temperature) is July (32.6°C).
The month with the lowest average high temperature is January (10.3°C).

  • Average low temperature in December: 4.3°C

The month with the highest average low temperature is July (22°C).
The coldest month (with the lowest average low temperature) is January (1.6°C).

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Average pressure in December
Atlanta, GA

Average pressure in December - Atlanta, GA
  • Average pressure in December: 1020.9mbar

The month with the highest atmospheric pressure is January (1021.4mbar).
The month with the lowest atmospheric pressure is June (1015.5mbar).

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Average wind speed in December
Atlanta, GA

Average wind speed in December - Atlanta, GA
  • Average wind speed in December: 12km/h

The windiest month (with the highest average wind speed) is January (12.9km/h).
The calmest month (with the lowest average wind speed) is August (7.3km/h).

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Average humidity in December
Atlanta, GA

Average humidity in December - Atlanta, GA
  • Average humidity in December: 77%

The month with the highest relative humidity is December (77%).
Months with the lowest relative humidity are July and August (69%).

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Average rainfall in December
Atlanta, GA

Average rainfall in December - Atlanta, GA
  • Average rainfall in December: 33mm

The wettest month (with the highest rainfall) is August (59mm).
The driest month (with the least rainfall) is September (14mm).

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Average rainfall days in December
Atlanta, GA

Average rainfall days in December - Atlanta, GA
  • Average rainfall days in December: 9.5 days

The month with the highest number of rainy days is August (17.1 days).
The month with the least rainy days is November (6.9 days).

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Average snowfall in December
Atlanta, GA

Average snowfall in December - Atlanta, GA
  • Average snowfall in December: 3mm

The month with the highest snowfall is February (5mm).
Months with the least snowfall are April, May, June, July, August, September, October and November (0mm).

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Average snowfall days in December
Atlanta, GA

Average snowfall days in December - Atlanta, GA
  • Average snowfall days in December: 0.3 days

The month with the highest number of snowfall days is February (0.9 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
Atlanta, GA

Average daylight in December / Average sunshine in December - Atlanta, GA
  • Average daylight in December: 9.9h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in December: 5.1h

Months with the most sunshine are June and July (Average sunshine: 10.7h).
The month with the least sunshine is December (Average sunshine: 5.1h).

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Average sunshine days in December
Atlanta, GA

Average sunshine days in December - Atlanta, GA
  • Average sunshine days in December: 19.2 days

The month with the most sunshine days is October (22.6 days).
The month with the least sunshine days is July (10.9 days).

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Average UV index in December
Atlanta, GA

Average UV index in December - Atlanta, GA
  • Average UV index in December: 2

The month with the highest UV index is August (UV index 7).
Months with the lowest UV index are January and December (UV index 2).

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Average cloud cover in December
Atlanta, GA

Average cloud cover in December - Atlanta, GA
  • Average cloud cover in December: 46

The month with the most cloud cover is December (Cloud cover 46).
The month with the least cloud cover is June (Cloud cover 29).

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Average visibility in December
Atlanta, GA

Average visibility in December - Atlanta, GA
  • Average visibility in December: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).

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