December weather forecast
Myrtle Beach, SC

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The glorious Myrtle Beach in South Carolina, with lit city buildings
The glorious Myrtle Beach in South Carolina, with lit city buildings

Weather in December

Rounding up the year, December presents the coldest weather in Myrtle Beach, South Carolina, with a return to the winter season. Lower temperatures characterize this month as the average high temperature dips to 58.3°F (14.6°C), and the lows hover around 46.9°F (8.3°C). Rainfall experiences a slight increase to approximately 2.64" (67mm) expected over nearly 11.6 days. As the city prepares to transition back into January, similar weather patterns are anticipated, marking the start of a new cycle. Despite the chill, the charm of Myrtle Beach continues to shine, making it an all-year-round destination.

Temperature

Myrtle Beach registers an average high-temperature of a mild 58.3°F (14.6°C) at the commencement of December, closely related to the preceding month. Throughout December, Myrtle Beach registers a consistent average low-temperature of 46.9°F (8.3°C).

Humidity

The months with the highest humidity are May, June, August and December, with an average relative humidity of 78%.

Rainfall

In Myrtle Beach, in December, it is raining for 11.6 days, with typically 2.64" (67mm) of accumulated precipitation. Throughout the year, in Myrtle Beach, there are 166.5 rainfall days, and 28.78" (731mm) of precipitation is accumulated.

Snowfall

January, February and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow. In Myrtle Beach, during the entire year, snow falls for 1 days and aggregates up to 0.16" (4mm) of snow.

Ocean temperature

In Myrtle Beach, in December, the average water temperature is 63.3°F (17.4°C).
Note: Swimming in 63.3°F (17.4°C) does not offer a pleasant experience for most individuals. The act of controlling one's breathing becomes progressively difficult as the water temperature goes under 69.8°F (21°C).

Daylight

December has the shortest days of the year in Myrtle Beach, with an average of 10h and 0min of daylight.
On the first day of December in Myrtle Beach, sunrise is at 7:02 am and sunset at 5:07 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 5:17 pm EST.

Sunshine

December has the least sunshine of the year, with an average of 5.6h of sunshine.

UV index

In December, the average daily maximum UV index in Myrtle Beach is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, a daily maximum UV index of 4 leads to the following instructions:
Undertake protective steps - Preventing sun damage is advised. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are December temperatures in Myrtle Beach?

In Myrtle Beach, 58.3°F (14.6°C) is the average high-temperature and 46.9°F (8.3°C) is the average low-temperature during December. In September, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is estimated at 87.8°F (31°C).

What is the most humid month in Myrtle Beach?

The months with the highest humidity in Myrtle Beach, South Carolina, are May, June, August and December, with an average relative humidity of 78%.

What is the average humidity in December in Myrtle Beach?

The average relative humidity in December in Myrtle Beach, South Carolina, is 78%.

How much does it rain in Myrtle Beach in December?

In Myrtle Beach, South Carolina, in December, during 11.6 rainfall days, 2.64" (67mm) of precipitation is typically accumulated.

When does it start to snow in Myrtle Beach?

December is the first month it typically snows. Throughout December, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow.

How cold is the water in December in Myrtle Beach?

In December, the average ocean temperature in Myrtle Beach, South Carolina, is 63.3°F (17.4°C). For most, swimming in 63.3°F (17.4°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

What is the month with the shortest days in Myrtle Beach?

December has the shortest days of the year, with an average of 10h and 0min of daylight.

What is the average length of the day in December in Myrtle Beach?

In December, the average day length is 9h and 58min.

What time are sunrise and sunset in December in Myrtle Beach?

In December, on the first day of the month, sunrise is at 7:02 am and sunset at 5:07 pm. On the last day of the month, in Myrtle Beach, South Carolina, sunrise is at 7:20 am and sunset at 5:17 pm EST.

What is the month with the least sunshine in Myrtle Beach?

With an average of 5.6h of sunshine, December has the least sunshine of the year in Myrtle Beach, South Carolina.

How many hours of sunshine does Myrtle Beach have in December?

In December, the average sunshine duration in Myrtle Beach, South Carolina, is 5.6h.

What is the UV index intensity in December in Myrtle Beach?

In December, the average daily maximum UV index in Myrtle Beach is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Myrtle Beach, SC

Average temperature in December - Myrtle Beach, SC
  • Average high temperature in December: 58.3°F

The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (54.3°F).

  • Average low temperature in December: 46.9°F

The month with the highest average low temperature is July (76.3°F).
The coldest month (with the lowest average low temperature) is January (42.1°F).

Average pressure in December
Myrtle Beach, SC

Average pressure in December - Myrtle Beach, SC
  • Average pressure in December: 30.13"Hg

The months with the highest atmospheric pressure are January and December (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).

Average wind speed in December
Myrtle Beach, SC

Average wind speed in December - Myrtle Beach, SC
  • Average wind speed in December: 9.3mph

The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (7.9mph).

Average humidity in December
Myrtle Beach, SC

Average humidity in December - Myrtle Beach, SC
  • Average humidity in December: 78%

The months with the highest relative humidity are May, June, August and December (78%).
The months with the lowest relative humidity are January and November (74%).

Average rainfall in December
Myrtle Beach, SC

Average rainfall in December - Myrtle Beach, SC
  • Average rainfall in December: 2.64"

The wettest month (with the highest rainfall) is August (4.53").
The driest month (with the least rainfall) is January (1.02").

Average rainfall days in December
Myrtle Beach, SC

Average rainfall days in December - Myrtle Beach, SC
  • Average rainfall days in December: 11.6 days

The months with the highest number of rainy days are July and August (19.8 days).
The month with the least rainy days is November (9.7 days).

Average snowfall in December
Myrtle Beach, SC

Average snowfall in December - Myrtle Beach, SC
  • Average snowfall in December: 0.04"

The month with the highest snowfall is February (0.08").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").

Average snowfall days in December
Myrtle Beach, SC

Average snowfall days in December - Myrtle Beach, SC
  • Average snowfall days in December: 0.2 days

The month with the highest number of snowfall days is January (0.4 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

Average sea temperature in December
Myrtle Beach, SC

Average sea temperature in December - Myrtle Beach, SC
  • Average sea temperature in December: 63.3°F

The best month for swimming (with the highest average sea temperature) is August (82.9°F).
The coldest month (with the lowest average sea temperature) is March (57.7°F).

Average daylight in December /
Average sunshine in December
Myrtle Beach, SC

Average daylight in December / Average sunshine in December - Myrtle Beach, SC
  • Average daylight in December: 10h and 0min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in December: 5h and 4min

The months with the most sunshine are July and August (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).

Average sunshine days in December
Myrtle Beach, SC

Average sunshine days in December - Myrtle Beach, SC
  • Average sunshine days in December: 17.7 days

The month with the most sunshine days is October (19.1 days).
The month with the least sunshine days is June (8.2 days).

Average UV index in December
Myrtle Beach, SC

Average UV index in December - Myrtle Beach, SC
  • Average UV index in December: 4

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

Average cloud cover in December
Myrtle Beach, SC

Average cloud cover in December - Myrtle Beach, SC
  • Average cloud cover in December: 40

The months with the most cloud cover are February and December (Cloud cover 40).
The month with the least cloud cover is June (Cloud cover 25).

Average visibility in December
Myrtle Beach, SC

Average visibility in December - Myrtle Beach, 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).

Myrtle Beach, South Carolina, USA

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