Weather in Charleston, United States in December

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Visiting Charleston, United States in December

The weather in December is cooler than the previous month and temperatures continue to drop slightly into January. December has average maximum temperatures of 16°C (61°F) which is a little too chilly for sunbathing. The sunshine percentage is 63% making it sunny but overcast at times. The hours of sunshine per day are 6.3hrs. It is not a good time for sunbathing in Charleston.

December has total rainfall of 9.7cm (3.8inches) making it mostly dry with only light showers. There are just 9.6 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days.

Sea temperatures are a warm 22°C (72°F). December is a good month for swimming in Charleston with comfortable temperatures for most people. The sea temperature in December is marginally cooler than the previous month and temperatures continue to drop slightly into January.

Consider visiting Charleston in the months of June, July, August, September, for the best beach weather. Also consider one of our other suggestions for December.

Can you sunbathe in Charleston in December?

No, December is not a good time for sunbathing in Charleston.

December has average maximum temperatures of 16°C (61°F) which is a little too chilly for sunbathing. The sunshine percentage is 63% making it sunny but overcast at times. The hours of sunshine per day are 6.3hrs. December has total rainfall of 9.7cm (3.8inches) making it mostly dry with only light showers. There are just 9.6 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days.

More about December temperature and sunshine.

Can you swim in Charleston in December?

Yes, December is a good month for swimming in Charleston with warm sea temperatures 22°C (72°F).

More about December sea temperatures.

Is December a good time to holiday in Charleston?

Probably not, December is not a good time for a holiday in Charleston.

December has average maximum temperatures of 16°C (61°F) which is a little too chilly for sunbathing. The sunshine percentage is 63% making it sunny but overcast at times. The hours of sunshine per day are 6.3hrs. December has total rainfall of 9.7cm (3.8inches) making it mostly dry with only light showers. There are just 9.6 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days. It is not a good time for sunbathing in Charleston. Sea temperatures are a warm 22°C (72°F). December is a good month for swimming in Charleston with comfortable temperatures for most people.

More about the December temperatures and sunshine.

Is Charleston warm in December?

No, Charleston is a little too chilly for sunbathing in December.

The average maximum temperature in Charleston in December is 16°C (61°F). The average maximum temperature is 20°C (68°) in the previous month and 15°C (59°F) in the next month.

The average temperature in Charleston in December is 12°C (53°F). The average temperature is 14°C (57°F) in the previous month and 10°C (49°F) in the next month.

More info about the December temperatures and sunshine.

How sunny is Charleston in December?

The average day light hours per day in Charleston in December are 10. The sunshine percentage is 63% making it sunny but overcast at times. The hours of sunshine per day are 6.3hrs.

More about December sunshine.

Temperature in Charleston in December

The weather in December is cooler than the previous month and temperatures continue to drop slightly into January. The average maximum temperature in Charleston in December is 16°C (61°F). The average maximum temperature is 20°C (68°F) in the previous month and 15°C (59°F) in the next month.

The average temperature in Charleston in December is 12°C (53°F). The average temperature is 14°C (57°F) in the previous month and 10°C (49°F) in the next month.

The average minimum temperature in Charleston in December is 7°C (45°F). The minimum temperature is 9°C (48°F) in the previous month and 5°C (40°F) in the next month.

Sunshine in Charleston in December

The days in December are slightly shorter than the previous month. December has fewer hours of sunshine than the previous month and hours of sunshine continue to drop quickly into January. During December the average day light hours are 10 per day in Charleston. The sunshine percentage is 63% making it sunny but overcast at times. The hours of sunshine per day are 6.3hrs.

The ultraviolet index in Charleston in December is typically 3.1 during December. An ultraviolet index reading of 3 to 5 indicates there is a moderate risk of harm from unprotected sun exposure. Keep out of the sun during the strongest hours around midday when unprotected skin risks burning in less than 30 minutes. For the sensitive wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days, and after swimming or sweating. Tanning for hours is possible with the right application of sun cream. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Charleston in December

The average sea water temperature in Charleston in December is 22.3°C (72.1°F) which is warm and pleasant for relaxing and swimming for long periods. The sea temperature in December is marginally cooler than the previous month and temperatures continue to drop slightly into January.

Rainfall in Charleston in December

December weather is slightly drier than the previous month. December has a couple of more days of rain than the previous month and rainy days continue to rise slightly into January. The average total rainfall in Charleston in December is 9.7cm (3.8inches) and on average there are 9.6 rainy days in December making it a quite rainy time to visit the beach.

Humidity in Charleston in December

The maximum dew point (an indicator of humidity) in Charleston in December is 11°C (53°F) which is very comfortable. The dew point is 13°C (55°F) in the previous month and 8°C (8°F) in the next month.

The average maximum relative humidity in Charleston in December is typically 93.6%. The maximum relative humidity is 94.4% in the previous month and 90.1% in the next month.

The average relative humidity in Charleston in December is typically 76.6%. The average relative humidity is 75.7% in the previous month and 71.3% in the next month.

Wind Speed in Charleston in December

The average maximum wind speed in Charleston in December is typically 21KM/H (13MPH). The average maximum wind speed is 22KM/H (14MPH) in the previous month and 23KM/H (14MPH) in the next month.

The average wind speed in Charleston in December is typically 9KM/H (6MPH). The average wind speed is 10KM/H (6MPH) in the previous month and 10KM/H (6MPH) in the next month.

The average wind direction in Charleston in December is from the North-Northwest.

Monthly Averages

Suggested Beaches in December

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Need Inspiration?

Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.