Verdict: Good month
Charleston Weather in December
December is mild-to-cool in Charleston, topping out near 16°C (61°F) — comfortable with a layer on. Expect showers on roughly 9 days of the month — rarely trip-ruining, worth planning around. Overall, December is a solid month to visit Charleston.
Average high
16°C / 61°F
Average low
8°C / 46°F
Rain days
~9
Precipitation
98 mm
What to pack for Charleston in December
- Layers — t-shirts under a light jacket or sweater
- Evenings turn genuinely cool — pack a warm layer for after dark
- A packable rain shell or compact umbrella earns its space
- Comfortable walking shoes — every guide on this site assumes you'll use them
December against the rest of the year
Warmest in Charleston: Jul (31°C / 88°F) · Coolest: Jan (15°C / 59°F) · Wettest: Aug (~20 rain days)
15°
7°
Jan
17°
9°
Feb
20°
12°
Mar
23°
15°
Apr
26°
19°
May
29°
23°
Jun
31°
25°
Jul
30°
24°
Aug
28°
21°
Sep
24°
17°
Oct
20°
12°
Nov
16°
8°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)