December weather forecast
Smyrna, GA

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Weather in December

Smyrna experiences a distinct winter chill during December, concluding the year with the lowest average temperatures of 53.6°F (12°C) high and 39°F (3.9°C) low. Snowfall reappears after a long spell of absence, hinting at a white Christmas possibility. Compared to November, December is decidedly colder, further shrunk daylight hours, signaling the peak of winter. Despite the cold, the festive season adds a warming charm to this month. Bundle up as the weather will be colder than any other all year.

Temperature

December is characterized by a mild reduction in the average high-temperature, from a refreshing 61°F (16.1°C) in November to a fresh 53.6°F (12°C). December nights experience a consistent temperature drop to a cold 39°F (3.9°C).

Humidity

December is the most humid month, with an average relative humidity of 78%.

Rainfall

In Smyrna, in December, it is raining for 13.7 days, with typically 3.78" (96mm) of accumulated precipitation. Throughout the year, there are 177.1 rainfall days, and 41.93" (1065mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Smyrna are January through March and December. December is the first month it typically snows in Smyrna, Georgia. Throughout December, in the average 0.8 snowfall days, it receives 0.67" (17mm) of snow. Throughout the year, in Smyrna, there are 4.5 snowfall days, and 2.6" (66mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 54min of daylight.
On the first day of the month, sunrise is at 7:25 am and sunset at 5:29 pm. On the last day of December, sunrise is at 7:43 am and sunset at 5:39 pm EST.

Sunshine

December has the least sunshine of the year in Smyrna, with an average of 5h of sunshine.

UV index

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Smyrna. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 3 in December interprets into the following recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. To avoid the Sun's strongest rays, limit exposure around the mid-day period. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
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Frequently asked questions

What is the usual temperature for Smyrna in December?

December temperatures in Smyrna, Georgia, vary between a high-temperature of 53.6°F (12°C) and a low-temperature of 39°F (3.9°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines air temperature and relative humidity, in September is appraised at 89.6°F (32°C).

What is the most humid month in Smyrna?

The most humid month is December, with an average relative humidity of 78%.

What is the average humidity in December in Smyrna?

The average relative humidity in December is 78%.

How many days does it rain in December in Smyrna?

In Smyrna, during December, the rain falls for 13.7 days and regularly aggregates up to 3.78" (96mm) of precipitation.

When does it start snowing in Smyrna?

December is the first month it typically snows. Throughout December, in the average 0.8 snowfall days, it receives 0.67" (17mm) of snow.

What is the month with the shortest days in Smyrna?

December has the shortest days of the year in Smyrna, Georgia, with an average of 9h and 54min of daylight.

What is the average length of the day in December in Smyrna?

In Smyrna, Georgia, the average day length in December is 9h and 56min.

When are sunrise and sunset in December in Smyrna?

On the first day of December in Smyrna, sunrise is at 7:25 am and sunset at 5:29 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 5:39 pm EST.

What is the month with the least sunshine in Smyrna?

The month with the least sunshine in Smyrna is December, with an average of 5h of sunshine.

How long on average sun shines in December in Smyrna?

In December, the average sunshine duration is 5h.

What are the months with the lowest UV index in Smyrna?

The months with the lowest UV index in Smyrna are January, February, November and December, with an average maximum UV index of 3.

What is the UV index reading in December in Smyrna?

In Smyrna, the average daily maximum UV index in December is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Smyrna, GA

Average temperature in December - Smyrna, GA
  • Average high temperature in December: 53.6°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 (49.6°F).

  • Average low temperature in December: 39°F

The month with the highest average low temperature is July (71.4°F).
The coldest month (with the lowest average low temperature) is January (34.2°F).

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Average pressure in December
Smyrna, GA

Average pressure in December - Smyrna, 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).

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Average wind speed in December
Smyrna, GA

Average wind speed in December - Smyrna, GA
  • Average wind speed in December: 7.5mph

The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).

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Average humidity in December
Smyrna, GA

Average humidity in December - Smyrna, GA
  • Average humidity in December: 78%

The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is August (68%).

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Average rainfall in December
Smyrna, GA

Average rainfall in December - Smyrna, GA
  • Average rainfall in December: 3.78"

The wettest month (with the highest rainfall) is August (4.88").
The driest month (with the least rainfall) is October (2.24").

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Average rainfall days in December
Smyrna, GA

Average rainfall days in December - Smyrna, GA
  • Average rainfall days in December: 13.7 days

The month with the highest number of rainy days is July (19.6 days).
The month with the least rainy days is November (9.5 days).

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Average snowfall in December
Smyrna, GA

Average snowfall in December - Smyrna, GA
  • Average snowfall in December: 0.67"

The month with the highest snowfall is January (0.98").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days in December
Smyrna, GA

Average snowfall days in December - Smyrna, GA
  • Average snowfall days in December: 0.8 days

The month with the highest number of snowfall days is January (1.6 days).
The 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
Smyrna, GA

Average daylight in December / Average sunshine in December - Smyrna, GA
  • Average daylight in December: 9h and 5min

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 36min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).

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Average sunshine days in December
Smyrna, GA

Average sunshine days in December - Smyrna, GA
  • Average sunshine days in December: 15.7 days

The month with the most sunshine days is October (20.1 days).
The month with the least sunshine days is July (9.6 days).

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Average UV index in December
Smyrna, GA

Average UV index in December - Smyrna, GA
  • Average UV index in December: 3

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, November and December (UV index 3).

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Average cloud cover in December
Smyrna, GA

Average cloud cover in December - Smyrna, GA
  • Average cloud cover in December: 48

The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 31).

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Average visibility in December
Smyrna, GA

Average visibility in December - Smyrna, 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).

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Smyrna, Georgia, USA

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