Charleston (SC)
December
Weather in Charleston, South Carolina for December 2026
Your guide to Charleston weather in December - trends and predictions
In general, the average temperature in Charleston at the beginning of December is 14.4 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 16.1 °F by the end of December.
The climate of Charleston in December is notably wet, with an average of 14 rainy days, and a total of 130.6 mm of precipitation.
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Temperatures
Rain 🌧️
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17
Dry days
14
Rainy days
0
Snow days
16°/9°
Temperatures
20 km/h
Avg max wind
66 %
Avg humidity
Charleston Weather December
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Temperatures trend during December in Charleston
See the weather trend as well as the moving average line
December weather in Charleston day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Dec. 1 |  Mist | 17° /8° | 0 mm | 4 | |
| Dec. 2 |  Light rain shower | 17° /10° | 15 mm | 4 | |
| Dec. 3 | Light rain shower | 14° /8° | 1.9 mm | 4 | |
| Dec. 4 |  Overcast | 16° /6° | 0 mm | 4 | |
| Dec. 5 | Overcast | 14° /8° | 5.8 mm | 3 | |
| Dec. 6 |  Cloudy | 11° /4° | 3.7 mm | 3 | |
| Dec. 7 |  Sunny | 12° /4° | 2.7 mm | 4 | |
| Dec. 8 | Overcast | 15° /6° | 0 mm | 3 | |
| Dec. 9 | Patchy rain possible | 17° /9° | 1.8 mm | 4 | |
| Dec. 10 | Light rain shower | 20° /11° | 7.6 mm | 5 | |
| Dec. 11 | Patchy rain possible | 15° /7° | 7.7 mm | 4 | |
| Dec. 12 | Sunny | 15° /5° | 0 mm | 4 | |
| Dec. 13 | Overcast | 15° /7° | 0 mm | 4 | |
| Dec. 14 | Overcast | 15° /7° | 0 mm | 3 | |
| Dec. 15 |  Partly cloudy | 12° /4° | 1.9 mm | 4 | |
| Dec. 16 | Light rain shower | 15° /7° | 1.1 mm | 4 | |
| Dec. 17 | Light rain shower | 18° /12° | 34.4 mm | 4 | |
| Dec. 18 | Partly cloudy | 18° /12° | 28.4 mm | 5 | |
| Dec. 19 | Sunny | 17° /10° | 11.2 mm | 4 | |
| Dec. 20 | Overcast | 14° /5° | 0 mm | 3 | |
| Dec. 21 | Overcast | 14° /4° | 0 mm | 3 | |
| Dec. 22 | Overcast | 13° /5° | 0 mm | 3 | |
| Dec. 23 | Overcast | 14° /7° | 0 mm | 3 | |
| Dec. 24 | Light rain shower | 16° /10° | 9.3 mm | 2 | |
| Dec. 25 | Light rain shower | 19° /12° | 6.3 mm | 3 | |
| Dec. 26 | Light rain shower | 17° /11° | 5.4 mm | 2 | |
| Dec. 27 | Overcast | 18° /13° | 0 mm | 3 | |
| Dec. 28 | Overcast | 17° /13° | 0 mm | 3 | |
| Dec. 29 | Sunny | 16° /11° | 5.1 mm | 3 | |
| Dec. 30 | Overcast | 13° /7° | 1.2 mm | 3 | |
| Dec. 31 | Sunny | 13° /4° | 0 mm | 3 | |
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Important Notice
Our weather forecast for Charleston in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Charleston forecast closer to your planned date for the most up-to-date weather information.
Change Month
Charleston in December - FAQ
What are the expected maximum and minimum temperatures in Charleston during December?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 9°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Charleston during December?
Significant rainfall exceeding 130.6 mm is expected in Charleston during December, occurring over more than 14 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Charleston during December?
The average wind speed in Charleston during December is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Charleston
Explore the daily rainfall trends and prepare for Charlestons December weather 💧
Typically, Charleston has 14 rainy days in December with a total of 130.6 mm of rainfall.
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