December weather forecast
Mount Pleasant, SC

A cute mirror image of the pink sunset sky looming overhead, and the docked fishing boats, with a far view of a high bridge, Mt. Pleasant, SC
A cute mirror image of the pink sunset sky looming overhead, and the docked fishing boats, with a far view of a high bridge, Mt. Pleasant, SC

Weather in December

The first month of the winter, December, is still a mild month in Mount Pleasant, South Carolina, with an average temperature varying between 50°F (10°C) and 60.6°F (15.9°C).

Temperature

In December, the average high-temperature is relatively the same as in November - a moderate 60.6°F (15.9°C). The average low-temperature, in Mount Pleasant, is 50°F (10°C).

Humidity

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

Rainfall

In December, in Mount Pleasant, the rain falls for 10.5 days. Throughout December, 4.25" (108mm) of precipitation is accumulated. In Mount Pleasant, during the entire year, the rain falls for 182.9 days and collects up to 44.69" (1135mm) of precipitation.

Snowfall

Months with snowfall in Mount Pleasant are January, February and December. The month with the most snowfall is December, when 0.31" (8mm) of snow is typically aggregated.

Daylight

With an average of 10h and 2min of daylight, December has the shortest days of the year in Mount Pleasant.
On the first day of December, sunrise is at 7:03 am and sunset at 5:12 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 5:23 pm EST.

Sunshine

The month with the least sunshine is December, with an average of 5.7h of sunshine.

UV index

In December, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 4 in December interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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 Mount Pleasant?

In Mount Pleasant, in December, the average high-temperature is 60.6°F (15.9°C), and the average low-temperature is 50°F (10°C). in September, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is calculated to be 91.4°F (33°C).

What is the most humid month in Mount Pleasant?

The most humid month in Mount Pleasant, South Carolina, is December, with an average relative humidity of 78%.

What is the average humidity in December in Mount Pleasant?

In Mount Pleasant, South Carolina, the average relative humidity in December is 78%.

How many days does it rain in December in Mount Pleasant?

In Mount Pleasant, South Carolina, in December, during 10.5 rainfall days, 4.25" (108mm) of precipitation is typically accumulated.

When does it snow the most in Mount Pleasant?

December is the month with the most snowfall, with 0.31" (8mm) of accumulated snow.

When does it start to snow in Mount Pleasant?

December is the first month it typically snows in Mount Pleasant. Throughout December, Mount Pleasant receives 0.31" (8mm) of snow.

What is the month with the shortest days in Mount Pleasant?

December has the shortest days of the year in Mount Pleasant, with an average of 10h and 2min of daylight.

What is the average length of the day in December in Mount Pleasant?

In Mount Pleasant, South Carolina, the average day length in December is 10h and 2min.

What time are sunrise and sunset in December in Mount Pleasant?

In December, on the first day of the month, sunrise is at 7:03 am and sunset at 5:12 pm. On the last day of the month, in Mount Pleasant, South Carolina, sunrise is at 7:21 am and sunset at 5:23 pm EST.

What is the month with the least sunshine in Mount Pleasant?

December has the least sunshine of the year, with an average of 5.7h of sunshine.

How many hours of sunshine does Mount Pleasant have in December?

In December, the average sunshine duration is 5.7h.

How high is the UV index in December in Mount Pleasant?

In December, the average daily maximum UV index in Mount Pleasant is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Mount Pleasant, SC

Average temperature in December - Mount Pleasant, SC
  • Average high temperature in December: 60.6°F

The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (57.2°F).

  • Average low temperature in December: 50°F

The month with the highest average low temperature is July (77.9°F).
The coldest month (with the lowest average low temperature) is January (45.1°F).

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Average pressure in December
Mount Pleasant, SC

Average pressure in December - Mount Pleasant, SC
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

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Average wind speed in December
Mount Pleasant, SC

Average wind speed in December - Mount Pleasant, SC
  • Average wind speed in December: 9.1mph

The windiest month (with the highest average wind speed) is April (9.8mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).

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Average humidity in December
Mount Pleasant, SC

Average humidity in December - Mount Pleasant, SC
  • Average humidity in December: 78%

The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are January and March (73%).

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Average rainfall in December
Mount Pleasant, SC

Average rainfall in December - Mount Pleasant, SC
  • Average rainfall in December: 4.25"

The wettest month (with the highest rainfall) is August (8.03").
The driest month (with the least rainfall) is January (1.38").

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Average rainfall days in December
Mount Pleasant, SC

Average rainfall days in December - Mount Pleasant, SC
  • Average rainfall days in December: 10.5 days

The month with the highest number of rainy days is August (25.8 days).
The month with the least rainy days is November (8.6 days).

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Average snowfall in December
Mount Pleasant, SC

Average snowfall in December - Mount Pleasant, SC
  • Average snowfall in December: 0.3"

The month with the highest snowfall is December (0.3").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in December
Mount Pleasant, SC

Average snowfall days in December - Mount Pleasant, SC
  • Average snowfall days in December: 0 days

The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).

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Average daylight in December /
Average sunshine in December
Mount Pleasant, SC

Average daylight in December / Average sunshine in December - Mount Pleasant, SC
  • Average daylight in December: 10h and 2min

The month with the longest days is June (Average daylight: 14h and 17min).
The month with the shortest days is December (Average daylight: 10h and 2min).

  • Average sunshine in December: 5h and 42min

The months with the most sunshine are June and July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

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Average sunshine days in December
Mount Pleasant, SC

Average sunshine days in December - Mount Pleasant, SC
  • Average sunshine days in December: 18.2 days

The months with the most sunshine days are January and November (19.3 days).
The month with the least sunshine days is August (3 days).

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Average UV index in December
Mount Pleasant, SC

Average UV index in December - Mount Pleasant, SC
  • Average UV index in December: 4

The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).

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Average cloud cover in December
Mount Pleasant, SC

Average cloud cover in December - Mount Pleasant, SC
  • Average cloud cover in December: 39

The month with the most cloud cover is December (Cloud cover 39).
The months with the least cloud cover are June and July (Cloud cover 26).

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Average visibility in December
Mount Pleasant, SC

Average visibility in December - Mount Pleasant, 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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