Charleston County (Charleston)
December
Weather in Charleston County for December 2025
Your guide to Charleston County weather in December - trends and predictions
In general, the average temperature in Charleston County at the beginning of December is 15.6 °F. As the month progressed, temperatures tended to slightly increase, reaching an average of 15.9 °F by the end of December.
Charleston County experiences moderate rainfall in December, with an average of 8 rainy days and a total precipitation of 161.8 mm.
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Temperatures
Rain 🌧️
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23
Dry days
8
Rainy days
0
Snow days
16°/9°
Temperatures
21 km/h
Avg max wind
64 %
Avg humidity
Charleston County in December average weather
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  18° | 2  17° | 3 16° | 4  18° | 5 15° | 6  12° | |
| 7  13° | 8 17° | 9 21° | 10 22° | 11 16° | 12 13° | 13 14° |
| 14 14° | 15  14° | 16 18° | 17 21° | 18 18° | 19 14° | 20 13° |
| 21 13° | 22 12° | 23 13° | 24 15° | 25 17° | 26 17° | 27 16° |
| 28 17° | 29 15° | 30 15° | 31 14° |
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Temperatures trend during December in Charleston County
See the weather trend as well as the moving average line
December weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Dec. 1 | Mist | 18° /8° | 0 mm | 4 | |
| Dec. 2 | Light rain shower | 17° /11° | 4.2 mm | 5 | |
| Dec. 3 | Light rain shower | 16° /11° | 2.8 mm | 4 | |
| Dec. 4 | Overcast | 18° /8° | 0 mm | 5 | |
| Dec. 5 | Overcast | 15° /8° | 0 mm | 4 | |
| Dec. 6 | Cloudy | 12° /4° | 0 mm | 4 | |
| Dec. 7 | Sunny | 13° /2° | 0 mm | 5 | |
| Dec. 8 | Overcast | 17° /7° | 0 mm | 4 | |
| Dec. 9 | Patchy rain possible | 21° /13° | 2.7 mm | 5 | |
| Dec. 10 | Light rain shower | 22° /15° | 11.4 mm | 5 | |
| Dec. 11 | Patchy rain possible | 16° /8° | 11.5 mm | 4 | |
| Dec. 12 | Sunny | 13° /5° | 0 mm | 4 | |
| Dec. 13 | Overcast | 14° /6° | 0 mm | 4 | |
| Dec. 14 | Overcast | 14° /8° | 0 mm | 3 | |
| Dec. 15 | Partly cloudy | 14° /7° | 2.8 mm | 4 | |
| Dec. 16 | Light rain shower | 18° /10° | 1.7 mm | 4 | |
| Dec. 17 | Light rain shower | 21° /14° | 51.6 mm | 5 | |
| Dec. 18 | Partly cloudy | 18° /12° | 0.9 mm | 5 | |
| Dec. 19 | Sunny | 14° /8° | 0 mm | 4 | |
| Dec. 20 | Overcast | 13° /5° | 0 mm | 4 | |
| Dec. 21 | Overcast | 13° /4° | 0 mm | 4 | |
| Dec. 22 | Overcast | 12° /4° | 0 mm | 4 | |
| Dec. 23 | Partly cloudy | 13° /6° | 0 mm | 4 | |
| Dec. 24 | Light rain shower | 15° /9° | 13.9 mm | 4 | |
| Dec. 25 | Light rain shower | 17° /11° | 9.4 mm | 5 | |
| Dec. 26 | Light rain shower | 17° /10° | 8.2 mm | 4 | |
| Dec. 27 | Fog | 16° /12° | 0.1 mm | 4 | |
| Dec. 28 | Partly cloudy | 17° /13° | 0 mm | 5 | |
| Dec. 29 | Sunny | 15° /12° | 7.7 mm | 4 | |
| Dec. 30 | Overcast | 15° /9° | 1.8 mm | 4 | |
| Dec. 31 | Sunny | 14° /5° | 0 mm | 4 | |
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Important Notice
Our weather forecast for Charleston County 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 County forecast closer to your planned date for the most up-to-date weather information.
Charleston County in December - FAQ
What are the expected maximum and minimum temperatures in Charleston County 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 County during December?
Significant rainfall exceeding 161.8 mm is expected in Charleston County during December, occurring over more than 8 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Charleston County during December?
The average wind speed in Charleston County during December is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Charleston County
Explore the daily rainfall trends and prepare for Charleston Countys December weather 💧
UV exposure in Charleston County during December
Stay informed about UV levels for safe outdoor activities throughout the month of December ☀️
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