Weather in Charleston County, South Carolina for December 2025
Until now, December 2025 in Charleston County is cooler than usual, with temperatures averaging 12.3 °F, this is -2.7 °F below the typical seasonal average.
The forecast for the upcoming days in Charleston County predicts a temperature of 18.3 °F, which is slightly above the historical average.
In general, the average temperature in Charleston County at the beginning of December is 14.4 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 18.6 °F by the end of December.
The climate of Charleston County 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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Charleston County Weather December
Temperatures trend during December in Charleston County
December weather in Charleston County day by day
| 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 | 18° /10° | 1.7 mm | 4 | |
| Dec. 17 | Overcast | 15° /6° | 0 mm | 0.5 | |
| Dec. 18 |  Heavy rain | 19° /13° | 83.5 mm | 0.2 | |
| Dec. 19 |  Moderate rain | 23° /11° | 11.2 mm | 0.4 | |
| Dec. 20 | Sunny | 17° /8° | 0 mm | 0.6 | |
| Dec. 21 | Sunny | 18° /9° | 0 mm | 0 | |
| Dec. 22 | Sunny | 13° /7° | 0 mm | 4 | |
| Dec. 23 | Partly cloudy | 13° /4° | 0 mm | 3 | |
| Dec. 24 | Partly cloudy | 19° /10° | 0 mm | 4 | |
| Dec. 25 | Sunny | 20° /13° | 0 mm | 5 | |
| Dec. 26 | Sunny | 21° /13° | 0 mm | 5 | |
| Dec. 27 | Sunny | 21° /14° | 0 mm | 5 | |
| Dec. 28 | Partly cloudy | 21° /13° | 0 mm | 5 | |
| Dec. 29 | Sunny | 18° /10° | 0 mm | 4 | |
| Dec. 30 | Overcast | 15° /9° | 1.8 mm | 4 | |
| Dec. 31 | Sunny | 14° /5° | 0 mm | 4 | |
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Charleston County in December - FAQ
December rainfall patterns in Charleston County
UV exposure in Charleston County during December
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Where is Charleston County?Get accurate weather forecasts for Charleston County, located at latitude 32.777 and longitude -79.931. Stay updated with localized weather information tailored for Charleston County.