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.

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For a detailed overview over the year and the best time to visit the United States of America, check out our Hilton Head Island's climate page.

Hilton Head Island Temperature in December

Min Temperature 8°C (46°F)  

Max Temperature 18°C (64°F)  

Water Temperature 17°C (63°F)  

Chance of Rain 32%  

Precipitation 78 mm (3.1 in)  

Rainy days 10 days  

Sunshine 187 hours  

Percentage Sunshine 60%  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Hilton Head Island typically stay consistent throughout December, with daily highs averaging around 18°C (64°F). Nights are cold, with lows typically ranging from 5°C (41°F) to 8°C (46°F).

Average temperatures in December

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in December

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Historical weather for Hilton Head Island in December

Browse day-by-day weather records for Hilton Head Island spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Hilton Head Island historical weather extremes in December

According to our 49 years of weather records for Hilton Head Island, the following extremes were recorded between 1976 and 2025.

• The warmest day in December was on December 8, 1998, with a maximum of 27°C (81°F).

What to Wear in Hilton Head Island in December

Pleasant temperatures in December mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. The water temperature sits at about 17°C (63°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Hilton Head Island in December

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

6/10

Walking

6/10

Barbeque

6/10

Camping

4/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Hilton Head Island's climate page.

More climate data for Hilton Head Island

Temperature Rainfall Sunshine Water Temp

See the full Hilton Head Island climate overview or explore weather in the United States of America.