Hilton Head Island Weather in December

Hilton Head Island in December averages 18°C (64°F) during the day and 8°C (46°F) at night. This is part of the winter season, and quite a bit of rainfall is expected this month.

Rainfall in Hilton Head Island in December

Past climate data indicates that roughly 10 days will see rain, totalling around 78 mm (3.1 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Hilton Head Island in December

Temperatures in Hilton Head Island in December top out at 18°C (64°F) and drop to 8°C (46°F) overnight. December is known for being in the winter season. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. With lows around 8°C (46°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in Hilton Head Island in December

You can expect a moderate amount of sunlight, with approximately 187 hours. This means a pleasant mix of sun and overcast.

Average water temperature in December

At 17°C (63°F), the water is cool but manageable for those who don't mind a bit of a shock getting in. Most people adjust after a few minutes.

If you prefer dry days with pleasant temperatures, March, April, May, October and November typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.