December weather forecast
Greenville, SC

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The scenic Greenville City of South Carolina, with a view of the curved bridge over a small river flowing through the city
The scenic Greenville City of South Carolina, with a view of the curved bridge over a small river flowing through the city

Weather in December

December brings with it a palpable winter chill. The cold days and even colder nights, reaching 38.5°F (3.6°C), confirm winter's arrival in South Carolina. The sharp contrast in temperature between November and December marks the arrival of the coldest month. Rains batter the Greenville skyline often with the occasional snowfall being recorded. Therefore, winter gear is essential for all those venturing outdoors during December in Greenville.

Temperature

The arrival of December in Greenville correlates with a minor temperature reduction, down from November's refreshing 59.9°F (15.5°C) to a cool 52.7°F (11.5°C). In the month of December, the average low-temperature in Greenville, South Carolina, usually rests at a cold 38.5°F (3.6°C).

Humidity

The most humid month is December, with an average relative humidity of 76%.

Rainfall

December is the month with the most rainfall. Rain falls for 11.7 days and accumulates 4.06" (103mm) of precipitation.

Snowfall

Months with snowfall in Greenville are January through March, November and December. December is the month with the most snowfall. Snow falls for 0.5 days and accumulates 1.57" (40mm) 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 7:19 am and sunset at 5:18 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 5:28 pm EST.

Sunshine

December has the least sunshine of the year, with an average of 5.5h of sunshine.

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index in Greenville, South Carolina. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, an average UV index of 2 transforms into the following instructions:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always 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. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

What are the temperatures in Greenville in December?

In Greenville, in December, the average high-temperature is 52.7°F (11.5°C), and the average low-temperature is 38.5°F (3.6°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which represents the influence of relative humidity on air temperature, in September is calculated to be 87.8°F (31°C).

What is the most humid month in Greenville?

With an average relative humidity of 76%, December is the most humid month.

What is the average humidity in December in Greenville?

In Greenville, South Carolina, the average relative humidity in December is 76%.

What is the wettest month in Greenville?

December is the month with the most rainfall. Rain falls for 11.7 days and accumulates 4.06" (103mm) of precipitation.

How much does it rain in Greenville in December?

In Greenville, during December, the rain falls for 11.7 days and regularly aggregates up to 4.06" (103mm) of precipitation.

What is the snowiest month in Greenville?

The month with the most snowfall in Greenville, South Carolina, is December, when snow falls for 0.5 days and typically aggregates up to 1.57" (40mm) of snow.

How much does it snow in Greenville in December?

In December, it is snowing for 0.5 days. Throughout December, 1.57" (40mm) of snow is accumulated.

What is the month with the shortest days in Greenville?

December has the shortest days of the year in Greenville, South Carolina, with an average of 9h and 54min of daylight.

How many hours of daylight does Greenville have in December?

The average day length in December is 9h and 52min.

When is the sunrise / sunset in December in Greenville?

On the first day of December, sunrise is at 7:19 am and sunset at 5:18 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 5:28 pm EST.

What is the month with the least sunshine in Greenville?

December has the least sunshine of the year in Greenville, South Carolina, with an average of 5.5h of sunshine.

How long on average sun shines in December in Greenville?

In December, the average sunshine duration is 5.5h.

When is the lowest UV index in Greenville?

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

How high is the UV index in December in Greenville?

The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to Sun's UV rays.
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
Greenville, SC

Average temperature in December - Greenville, SC
  • Average high temperature in December: 52.7°F

The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (49.6°F).

  • Average low temperature in December: 38.5°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (33.3°F).

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Average pressure in December
Greenville, SC

Average pressure in December - Greenville, SC
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).

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Average wind speed in December
Greenville, SC

Average wind speed in December - Greenville, SC
  • Average wind speed in December: 5.9mph

The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

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Average humidity in December
Greenville, SC

Average humidity in December - Greenville, SC
  • Average humidity in December: 76%

The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is July (69%).

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Average rainfall in December
Greenville, SC

Average rainfall in December - Greenville, SC
  • Average rainfall in December: 4.06"

The wettest month (with the highest rainfall) is December (4.06").
The driest month (with the least rainfall) is September (1.57").

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Average rainfall days in December
Greenville, SC

Average rainfall days in December - Greenville, SC
  • Average rainfall days in December: 11.7 days

The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is October (9.4 days).

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Average snowfall in December
Greenville, SC

Average snowfall in December - Greenville, SC
  • Average snowfall in December: 1.57"

The month with the highest snowfall is December (1.57").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Greenville, SC

Average snowfall days in December - Greenville, SC
  • Average snowfall days in December: 0.5 days

The month with the highest number of snowfall days is January (1.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
Greenville, SC

Average daylight in December / Average sunshine in December - Greenville, SC
  • Average daylight in December: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in December: 5h and 3min

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).

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Average sunshine days in December
Greenville, SC

Average sunshine days in December - Greenville, SC
  • Average sunshine days in December: 17.9 days

The month with the most sunshine days is October (20.6 days).
The month with the least sunshine days is July (10.2 days).

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Average UV index in December
Greenville, SC

Average UV index in December - Greenville, SC
  • 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).

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Average cloud cover in December
Greenville, SC

Average cloud cover in December - Greenville, SC
  • Average cloud cover in December: 41

The months with the most cloud cover are February and December (Cloud cover 41).
The months with the least cloud cover are June and July (Cloud cover 27).

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Average visibility in December
Greenville, SC

Average visibility in December - Greenville, SC
  • 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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Greenville, South Carolina, USA

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