Charleston
South Carolina, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Charleston, SC

Trees along both sides of a street in Charleston, South Carolina, in the twilight light
Trees along both sides of a street in Charleston, South Carolina, in the twilight light
Diciembre, the first month of the winter, in Charleston, is still a comfortable month, with average temperature fluctuating between 61.5°F (16.4°C) and 40.1°F (4.5°C).

Temperature

In Diciembre, the average high-temperature slightly decreases, from an agreeable 69.8°F (21°C) in Noviembre, to a comfortable 61.5°F (16.4°C). In Diciembre, the average low-temperature is 40.1°F (4.5°C).

Humidity

The average relative humidity in Charleston is 71.6%.

Rainfall

In Charleston, South Carolina, during 8.7 rainfall days, 3.11" (79mm) of precipitation is typically accumulated. In Charleston, during the entire year, the rain falls for 112.7 days and collects up to 51.03" (1296.1mm) of precipitation.

Snowfall

Months with snowfall in Charleston are Febrero and Diciembre. Diciembre is the month with the most snowfall in Charleston. Snow falls for 0.2 days and accumulates 0.5" (12.7mm) of snow.

Ocean temperature

In Charleston, the average seawater temperature is 66.2°F (19°C).
Note: For swimming, a surface water temperature of 66.2°F (19°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

Daylight

Diciembre has the shortest days of the year, with an average of 10h of daylight.

Sunshine

The month with the least sunshine in Charleston, South Carolina, is Diciembre, with an average of 5.5h of sunshine.

UV index

Enero and Diciembre, with an average maximum UV index of 3, are months with the lowest UV index in Charleston. A UV Index value of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 3 in Diciembre interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for 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.

What is the temperature in Diciembre in Charleston?

In Diciembre, the average high-temperature is 61.5°F (16.4°C), and the average low-temperature is 40.1°F (4.5°C).

What is the average humidity in Diciembre in Charleston?

In Charleston, the average relative humidity in Diciembre is 71.6%.

How much does it rain in Charleston in Diciembre?

In Charleston, South Carolina, during Diciembre, the rain falls for 8.7 days and regularly aggregates up to 3.11" (79mm) of precipitation.

When does it start to snow in Charleston?

Diciembre is the first month it typically snows in Charleston. Throughout Diciembre, in the average 0.2 snowfall days, it receives 0.5" (12.7mm) of snow.

When does it snow the most in Charleston?

Diciembre is the month with the most snowfall in Charleston, South Carolina. Snow falls for 0.2 days and accumulates 0.5" (12.7mm) of snow.

How cold is the water in Diciembre in Charleston?

In Charleston, in Diciembre, the average water temperature is 66.2°F (19°C). For swimming, a surface water temperature of 66.2°F (19°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

What is the month with the shortest days in Charleston?

The month with the shortest days in Charleston is Diciembre, with an average of 10h of daylight.

What is the average length of the day in Diciembre in Charleston?

In Diciembre, the average length of the day in Charleston, South Carolina, is 10h.

What is the month with the least sunshine in Charleston?

Diciembre has the least sunshine of the year in Charleston, with an average of 5.5h of sunshine.

How many hours of sunshine does Charleston have in Diciembre?

In Diciembre, the average sunshine in Charleston, South Carolina, is 5.5h.

When is the lowest UV index in Charleston?

Enero and Diciembre, with an average maximum UV index of 3, are months with the lowest UV index.

What is the UV index reading in Diciembre in Charleston?

In Charleston, South Carolina, the average daily maximum UV index in Diciembre is 3. A UV Index of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in December - Charleston, SC
  • Average high temperature in December: 61.6°F

The warmest month (with the highest average high temperature) is July (91.1°F).
The month with the lowest average high temperature is January (59°F).

  • Average low temperature in December: 40.1°F

The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (37.5°F).

Average humidity in December - Charleston, SC
  • Average humidity in December: 71.6%

The month with the highest relative humidity is August (78.9%).
The month with the lowest relative humidity is February (67.4%).

Average rainfall in December - Charleston, SC
  • Average rainfall in December: 3.1"

The wettest month (with the highest rainfall) is August (7.2").
The driest month (with the lowest rainfall) is November (2.4").

Average rainfall days in December - Charleston, SC
  • Average rainfall days in December: 8.7 days

The month with the highest number of rainy days is August (13.2 days).
The month with the lowest number of rainy days is November (7 days).

Average snowfall in December - Charleston, SC
  • Average snowfall in December: 0.5"

The month with the highest snowfall is December (0.5").
Months with the lowest snowfall are January, March, April, May, June, July, August, September, October and November (0").

Average snowfall days in December - Charleston, SC
  • Average snowfall days in December: 0.2 days

Months with the highest number of snowfall days are February and December (0.2 days).
Months with the lowest number of snowfall days are March, April, May, June, July, August, September, October and November (0 days).

Average sea temperature in December - Charleston, SC
  • Average sea temperature in December: 66.3°F

The best month for swimming (with the highest average sea temperature) is August (83.5°F).
The coldest month (with the lowest average sea temperature) is February (61.9°F).

Average daylight in December / Average sunshine in December - Charleston, SC
  • Average daylight in December: 10h

The month with the longest days is June (Average daylight: 14.3h).
The month with shortest days is December (Average daylight: 10h).

  • Average sunshine in December: 5.5h

The month with most sunshine is May (Average sunshine: 9.5h).
The month with least sunshine is December (Average sunshine: 5.5h).

Average UV index in December - Charleston, SC
  • Average UV index in December: 3

Months with the highest UV index are June, July and August (UV index 10).
Months with the lowest UV index are January and December (UV index 3).