Charleston Weather in December
December in Charleston brings moderate temperatures around 18°C (64°F) during the day, dropping to 8°C (46°F) at night, with quite a bit of rainfall expected, averaging around 84 mm (3.3 in) for the month.
Rainfall in Charleston in December
Typically around 10 days of rainfall are expected, averaging 84 mm (3.3 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Charleston in December
In December, expect moderate temperatures in Charleston, with highs of 18°C (64°F) and lows of 8°C (46°F) at night. This month falls in the winter season. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights fall to 8°C (46°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Charleston in December
The area experiences a moderate amount of sunshine, with approximately 170 hours of sunlight expected. This means a decent mix of sun and overcast.Should you favor a climate that's both dry and comfortably warm, April and May typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Charleston's climate page.
Charleston Temperature in December
Min Temperature
8°C (46°F)
Max Temperature
18°C (64°F)
Chance of Rain
33%
Precipitation
84 mm (3.3 in)
Rainy days
10 days
Humidity
71%
Sunshine
170 hours
Percentage Sunshine
55%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Charleston typically stay consistent throughout December, with daily highs averaging around 18°C (64°F). Nights are cold, with lows typically ranging from 5°C (41°F) to 7°C (45°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Charleston in December
Browse day-by-day weather records for Charleston spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Charleston historical weather extremes in December
Our historical data for Charleston spans 1976 to 2025, revealing these weather extremes.
- The warmest day in December was on December 8, 1978, with a maximum of 28°C (82°F).
Best Places in the United States of America in December
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in December →
perfect weather
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What to Wear in Charleston in December
Comfortable temperatures call for an easy wardrobe in December. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Charleston in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Charleston's climate page.
Temperature Rainfall Sunshine Humidity
See the full Charleston climate overview or explore weather in the United States of America.
