Charleston weather in December 2025

Expect daytime maximum temperatures of 61°F in Charleston, South Carolina in December based on long-term weather averages. There are 6 hours of sunshine per day on average with typically 3.0 inches of rainfall in the month.

  • 61°F maximum daytime temperature in December in Charleston61
    61°F max day temperature
  • 6 hours of sunshine per day
  • 8 days with some rainfall in December in Charleston8
    8 days with some rainfall
  • 45°F minimum night-time temperature in December in Charleston45
    45°F min night temperature
  • 10 hours of daylight per day in December in Charleston10
    10 hours of daylight per day
  • No heat & humidity in December in Charleston0
    No heat & humidity
  • 3.0 inches monthly rainfall in December in Charleston3.0
    3.0 inches of monthly rainfall
  • UV (maximum) index 3 (Moderate) in December in Charleston3
    3 (Moderate) UV index
  • 66°F sea temperature in December in Charleston66
    66°F sea temperature

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The December weather guide for South Carolina (Charleston) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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How warm is it in Charleston in December?

Daytime temperatures usually reach 61°F in Charleston in December, falling to 45°F at night.

How sunny is it in Charleston in December?

There are normally 6 hours of bright sunshine each day in Charleston in December - that's 56% of daylight hours.

How warm is the sea around Charleston in December?

The average sea temperature around Charleston in December is 66°F.

Does it rain in Charleston in December?

There are usually 8 days with some rain in Charleston in December and the average monthly rainfall is 3.0 inches.

Charleston December sunrise & sunset times

Browse the sunrise and sunset times for Charleston in December 2025. Select a month to view Charleston sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 07:04 17:13
Tuesday, 16th December 2025 07:15 17:16
Wednesday, 31st December 2025 07:22 17:24

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