Charleston Weather in December

December in Charleston brings moderate temperatures around 18°C (64°F) during the day, dropping to 8°C (46°F) at night, with quite a bit of rainfall expected, averaging around 84 mm (3.3 in) for the month.

Rainfall in Charleston in December

Typically around 10 days of rainfall are expected, averaging 84 mm (3.3 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Charleston in December

In December, expect moderate temperatures in Charleston, with highs of 18°C (64°F) and lows of 8°C (46°F) at night. This month falls in the winter season. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights fall to 8°C (46°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.

Sunshine in Charleston in December

The area experiences a moderate amount of sunshine, with approximately 170 hours of sunlight expected. This means a decent mix of sun and overcast.

Should you favor a climate that's both dry and comfortably warm, April and May typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.