Charleston in December
Find out everything about the water temperature in Charleston in December. Average, minimum and maximum recorded temperatures as well as daily temperature in December for the last two years. Compare the current month's sea temperature data with other months of the year.
Water temperature in December
Minimum:
37.4 °F
Average:
45.1 °F
Maximum:
53.1 °F
Sea water temperature in Charleston in December
In the city of Charleston, the month of December is too cold for swimming. The minimum recorded temperature during this month was 37.4°F on December 31, 2022, with an average temperature being 45.1°F and a maximum temperature reaching 53.1°F on December 1, 2020.
| Date | 10 years average | 2025 | 2024 |
|---|---|---|---|
| Dec 1 | 49.5°F | 47.6°F | 48.2°F |
| Dec 2 | 49.0°F | 46.1°F | 47.6°F |
| Dec 3 | 48.5°F | 46.3°F | 45.6°F |
| Dec 4 | 48.3°F | 45.5°F | 45.5°F |
| Dec 5 | 47.8°F | 44.5°F | 45.9°F |
| Dec 6 | 47.3°F | 44.8°F | 46.4°F |
| Dec 7 | 46.5°F | 41.0°F | 46.2°F |
| Dec 8 | 46.7°F | 41.6°F | 46.1°F |
| Dec 9 | 46.8°F | 42.3°F | 45.8°F |
| Dec 10 | 46.4°F | 42.7°F | 43.5°F |
| Dec 11 | 46.3°F | 43.1°F | 43.8°F |
| Dec 12 | 46.1°F | 41.5°F | 44.1°F |
| Dec 13 | 45.7°F | 42.1°F | 44.2°F |
| Dec 14 | 45.5°F | 42.2°F | 43.4°F |
| Dec 15 | 45.5°F | 41.8°F | 43.5°F |
| Dec 16 | 45.2°F | 41.3°F | 43.0°F |
| Dec 17 | 45.1°F | 41.3°F | 43.0°F |
| Dec 18 | 44.5°F | 39.3°F | 42.8°F |
| Dec 19 | 43.6°F | 39.2°F | 41.3°F |
| Dec 20 | 43.5°F | 40.5°F | 43.4°F |
| Dec 21 | 43.4°F | 39.7°F | 43.5°F |
| Dec 22 | 43.3°F | 39.8°F | 41.6°F |
| Dec 23 | 43.0°F | 39.1°F | 41.5°F |
| Dec 24 | 43.3°F | 39.3°F | 41.8°F |
| Dec 25 | 43.1°F | 39.3°F | 42.1°F |
| Dec 26 | 42.5°F | 39.6°F | 41.2°F |
| Dec 27 | 42.3°F | 38.3°F | 40.9°F |
| Dec 28 | 42.2°F | 38.5°F | 40.1°F |
| Dec 29 | 42.1°F | 37.9°F | 40.4°F |
| Dec 30 | 42.7°F | 38.2°F | 40.9°F |
| Dec 31 | 42.5°F | 38.5°F | 43.3°F |
In Charleston, the months July through August offer comfortable swimming conditions, which amounts to 67 swimming days.
The warmest water in Charleston was recorded on July 20, 2020, reaching a 81.8°F. While the coldest temperature occurred on January 19, 2022, dipping to 33.6°F. The average readings by season are 41.6°F in Winter, 49.8°F in Spring, 73.5°F in Summer, and 63.3°F in Autumn.
December's average temperature is a slight drop from November's average of 53.9°F. In January, the temperature is expected to decrease further, potentially averaging around 40.7°F.
Popular neighboring cities and resorts
| City | Water temperature* | Distance** |
|---|---|---|
| Staten Island |
39.7°F
|
5mi |
| Coney Island |
41.1°F
|
13mi |
| Jersey City |
39.5°F
|
16mi |
| Brooklyn |
40.4°F
|
17mi |
| New York City |
39.5°F
|
17mi |
* current water temperature in this city
** straight line distance from Charleston