December weather forecast
Clemson, SC

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Weather in December

December marks winter at full throttle in Clemson, the temperature dropping substantially from November's average to around 52.7°F (11.5°C). Winter in Clemson translates into cooler days, fewer sunshine hours, and the inclusion of warmer clothing in one's wardrobe. The city dresses up for the holiday season, evidenced by the Christmas lights and festive decorations adorning trees and buildings. As the year comes to an end, so does the cycle of seasons, preparing for another year of climatic diversity in Clemson.

Temperature

As Clemson enters December, the average high-temperature subtly lowers from the a refreshing 59.9°F (15.5°C) of November to a cool 52.7°F (11.5°C). Nightly temperatures drop to an average low of 38.3°F (3.5°C) in December.

Humidity

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

Rainfall

December is the month with the most rainfall. Rain falls for 11.8 days and accumulates 4.21" (107mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall. The month with the most snowfall in Clemson, South Carolina, is December, when snow falls for 0.7 days and typically aggregates up to 2.05" (52mm) of snow.

Daylight

December has the shortest days of the year in Clemson, with an average of 9h and 54min of daylight.
On the first day of December, sunrise is at 7:20 am and sunset at 5:20 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 5:30 pm EST.

Sunshine

The month with the least sunshine is December, with an average of 5.4h 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 value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high UV index of 2 in December translates into the following recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Minimize direct exposure to the Sun during midday when its radiation is at its peak. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
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Frequently asked questions

What are the temperatures in Clemson in December?

In December, the average high-temperature and low-temperature are 52.7°F (11.5°C) and 38.3°F (3.5°C) respectively. In September, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, is calculated to be 87.8°F (31°C).

What is the most humid month in Clemson?

The most humid month in Clemson, South Carolina, is December, with an average relative humidity of 77%.

What is the average humidity in December in Clemson?

In December, the average relative humidity in Clemson, South Carolina, is 77%.

What is the wettest month in Clemson?

December is the month with the most rainfall in Clemson, South Carolina. Rain falls for 11.8 days and accumulates 4.21" (107mm) of precipitation.

How much does it rain in Clemson in December?

In December, in Clemson, South Carolina, the rain falls for 11.8 days. Throughout December, 4.21" (107mm) of precipitation is accumulated.

When does it snow the most in Clemson?

December is the month with the most snowfall in Clemson. Snow falls for 0.7 days and accumulates 2.05" (52mm) of snow.

How much does it snow in Clemson in December?

In Clemson, South Carolina, in December, snow falls for 0.7 days, with typically accumulated 2.05" (52mm) of snow.

What is the month with the shortest days in Clemson?

The month with the shortest days in Clemson, South Carolina, is December, with an average of 9h and 54min of daylight.

How many hours of daylight does Clemson have in December?

The average day length in December in Clemson, South Carolina, is 9h and 53min.

What time are sunrise and sunset in December in Clemson?

On the first day of December, sunrise is at 7:20 am and sunset at 5:20 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 5:30 pm EST.

What is the month with the least sunshine in Clemson?

December has the least sunshine of the year, with an average of 5.4h of sunshine.

How many hours of sunshine does Clemson have in December?

The average sunshine duration in December in Clemson, South Carolina, is 5.4h.

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

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

What is the UV index intensity in December in Clemson?

In December, the average daily maximum UV index in Clemson, South Carolina, is 2. A UV Index estimate of 2, and below, represents a low health threat from unsafe 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
Clemson, SC

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

The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (49.6°F).

  • Average low temperature in December: 38.3°F

The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (33.4°F).

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Average pressure in December
Clemson, SC

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

The months with the highest atmospheric pressure are January and 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
Clemson, SC

Average wind speed in December - Clemson, SC
  • Average wind speed in December: 5.6mph

The windiest month (with the highest average wind speed) is February (6.3mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).

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Average humidity in December
Clemson, SC

Average humidity in December - Clemson, SC
  • 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%).

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Average rainfall in December
Clemson, SC

Average rainfall in December - Clemson, SC
  • Average rainfall in December: 4.21"

The wettest month (with the highest rainfall) is December (4.21").
The driest month (with the least rainfall) is September (1.73").

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Average rainfall days in December
Clemson, SC

Average rainfall days in December - Clemson, SC
  • Average rainfall days in December: 11.8 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is October (9.5 days).

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Average snowfall in December
Clemson, SC

Average snowfall in December - Clemson, SC
  • Average snowfall in December: 2.05"

The month with the highest snowfall is December (2.05").
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
Clemson, SC

Average snowfall days in December - Clemson, SC
  • Average snowfall days in December: 0.7 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
Clemson, SC

Average daylight in December / Average sunshine in December - Clemson, SC
  • 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 2min

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 24min).

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Average sunshine days in December
Clemson, SC

Average sunshine days in December - Clemson, SC
  • Average sunshine days in December: 17.5 days

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (10.5 days).

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Average UV index in December
Clemson, SC

Average UV index in December - Clemson, 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
Clemson, SC

Average cloud cover in December - Clemson, 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
Clemson, SC

Average visibility in December - Clemson, 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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Clemson, South Carolina, USA

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