ClimateExplore the planning map
Climate · Charleston

Charleston in December

Mild and mostly dry, as the days hold steady.

Typical weather, averaged over 30 years

December in Charleston is mild: highs near 65°F, lows near 49°F. Rain falls on about two days a week, and daylight holds at about 10 hours 1 minute.December in Charleston is mild: highs near 18°C, lows near 9°C. Rain falls on about two days a week, and daylight holds at about 10 hours 1 minute.

High
65°F18°Caverage
Low
49°F9°Caverage
Wet days
2a week · 28% of days
Daylight
10h 01mon average

Is December a good time to visit Charleston?

A good month, just outside Charleston's best months, which run in two parts: April, or October to November.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How December sits in the year

week by week

Temperature

Highs near 65°F in December, against 62°F to 90°F through the year.Highs near 18°C in December, against 17°C to 32°C through the year.

Chance of a wet day

28% of days in December, against 24% to 67% through the year.

Cloud cover

47% cover in December, against 38% to 57% through the year.

Daylight

10h 01m in December, against 10h 01m to 14h 16m through the year.

Week by week, lightly smoothed, with December shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. November71°22°low 55°low 13°2 wet days a weekRain on about two days a week.
  2. December65°18°low 49°low 9°2 wet days a weekRain on about two days a week.
  3. January62°17°low 46°low 8°2 wet days a weekRain on about two days a week.

Where Charleston sits, in December

America/New York
this place
typical high in December 40°F4°C95°F35°C
Sunrise, mid-December
7:15 AMsets 5:15 PM
Above the sea
0 mlow-lying
Latitude
32.8°Nnorthern hemisphere
Nearest of ours
Bluffton106 km south-west

The land around Charleston, shaded by its typical high in December, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in United States in December

high · low · wet days
See December on the planning mapThe whole year in Charleston

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Charleston. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match.Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match. Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.