The highest day temperature in December 2023 was 74°F. The lowest night temperature was 37°F. The average values for day and night temperatures during December were 61.2°F и 54.0°F respectivly.

The average sea surface temperature in December 2023 for Charleston was 57.5°F. The maximum and minimum values were 53.0°F and 61.6°F respectively.

Most of the days in December are sunny but you can also expect cloudy and gloomy days.

Precipitation total in December for Charleston is 3.5 in.

The average wind speed in December is 8.4 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Charleston in December is 5.5 hours.