When you spend Christmas in South Carolina, you get mild to cool weather that feels nothing like the snowy scenes up north. Most days, highs sit in the mid-50s to low 60s, and nights drop into the 30s or 40s, making it one of the more comfortable places to enjoy the holiday season.
Snow rarely falls outside the mountains. Still, you’ll often wake up to frosty mornings and that crisp air that gives a seasonal feel.
Conditions shift depending on where you are in the state. Coastal spots like Charleston stay warmer and sunnier, while the Midlands around Columbia cool off more at night.
The Upstate, including Greenville and the higher spots, gets colder and sometimes sees a little snow or ice.
With these different climates, you can plan all sorts of holiday activities. Maybe you’ll walk historic streets on the coast or chase mountain views in the Upstate, but either way, the weather brings a nice winter vibe without any harsh extremes.
Overview of South Carolina’s Climate
South Carolina has a humid subtropical climate, shaped by its coast and inland terrain. Warm, moist air from the Atlantic mixes with cooler air from the Appalachian Mountains, making the weather a bit unpredictable depending on where you are.
These factors bring differences in temperature, rainfall, and seasonal conditions across the state.
Humid Subtropical Climate Characteristics
Most of South Carolina gets hot, humid summers and mild winters. In summer, highs often reach the upper 80s to low 90s °F, while winter lows usually stay above freezing—unless you’re up in the mountains.
Rain falls pretty evenly throughout the year. Summer brings the most, usually from thunderstorms or tropical systems.
Winter is a bit drier, but cold fronts can still bring some rain.
Snow doesn’t happen much outside the Upstate region. Charleston and other coastal areas might see a dusting every few years, while Greenville usually gets a few inches most winters.
This climate lets plants thrive and keeps things green, but it also means humidity levels get high, especially from late spring through early fall.
Influence of the Atlantic Ocean and Appalachian Mountains
The Atlantic Ocean keeps the coast’s temperatures more stable. In Charleston, you’ll notice fewer extreme highs and lows compared to inland cities.
Ocean breezes take the edge off summer heat, though the humidity stays high.
Hurricane season can shake things up, with coastal areas more at risk for tropical storms and heavy rain. Inland places still get some impact, but storms usually weaken as they move away from the ocean.
The Appalachian Mountains in the northwest block some cold air from coming south. This keeps winters in the Piedmont and coastal plain milder than the higher elevations.
The mountains also squeeze more rain out of passing systems in the Upstate, while the Midlands and Lowcountry often stay a bit drier.
Regional Microclimates
You’ll spot distinct microclimates across South Carolina. The coast has warmer winters, higher humidity, and more rain during hurricane season.
In January, Charleston averages about 59°F. Columbia comes in around 56°F, and Greenville is cooler at 52°F.
The Midlands get hotter summers and slightly cooler winters than the coast. Columbia often tops the state’s highest summer temperatures, with July averages near 92°F.
The Upstate, including Greenville and the foothills, stays cooler year-round. Snow is more likely here, averaging 2–3 inches in January and February.
Elevation cuts down on humidity compared to the coastal plain, making summers a bit more tolerable even when it’s hot.
Typical December and Christmas Weather Patterns
In December, South Carolina brings cool to mild days, chilly nights, and a mix of dry and wet weather. The coast usually stays milder than the Midlands or Upstate.
Average Temperatures Across Regions
Temperatures really depend on where you are. Along the Coast and Lowcountry, highs hit the low 60s °F (16–17 °C), and lows fall to the low 40s °F (5–6 °C).
Charleston and Beaufort usually feel more inviting for outdoor fun than the inland spots.
In the Midlands, places like Columbia and Florence see highs in the upper 50s °F (14–15 °C). Nights get colder, dipping into the upper 30s °F (3–4 °C).
The Upstate is the coldest. Greenville and Spartanburg average mid-50s °F (12–13 °C) during the day and mid-30s °F (1–3 °C) at night.
Higher elevations like Caesars Head hang around the upper 40s °F (9 °C) for highs and near freezing overnight.
With this kind of range, you’ll want to pack layers—especially if you’re traveling around the state.
Precipitation and Snowfall Trends
December usually brings a moderate amount of rain. NOAA records show precipitation averages between 3 and 5 inches depending on where you are.
Rain comes in short bursts, not long, soaking storms.
On the coast, rainfall is steady but not overwhelming, averaging about 5 inches for the month. The Midlands get a little less, around 3 to 4 inches, and the Upstate averages close to 4 inches.
Snow is rare except in the mountains. In the Upstate, light snow might show up once or twice in December, but it hardly ever sticks.
The Midlands and Lowcountry almost never see measurable snow, and most years go by without any at all.
Humidity Levels and Daylight Hours
December humidity drops compared to summer but still hangs around. Relative humidity usually sits between 60% and 75%, so the air feels damp on rainy days but pretty comfy when it’s clear.
Daylight is in short supply this time of year. Around Christmas, you get less than 10 hours of light, with the shortest days averaging about 9 hours and 54 minutes.
That means you’ll want to schedule outdoor plans earlier in the day.
Even though humidity and daylight aren’t extreme, they really shape how December feels. Short days and cool, moist air give the state a distinct winter mood.
Regional Differences: Coast, Midlands, and Upstate
Weather shifts a lot depending on whether you’re near the coast, in the Midlands, or up in the Upstate. Elevation, distance from the ocean, and local geography all play a part in your Christmas week weather.
Weather in Charleston and Coastal Areas
On the coast—Charleston, Myrtle Beach, and Hilton Head Island—you’ll find pretty mild weather in late December. Highs reach the mid-50s to low 60s °F (12–16 °C), and lows usually stay in the 40s °F (4–9 °C).
Snow almost never happens. Charleston averages only a trace most years, though the 1989 Christmas snowstorm brought a rare treat.
Rain is more common, with December totals around 2.5–3 inches (65–75 mm).
Humidity lingers, but the cooler air makes it a lot less oppressive than in summer. Winds off the Atlantic can make evenings feel chilly.
If you’re planning outdoor activities, pack a light jacket and expect damp, breezy conditions.
Daylight runs about 10 hours, so you’ve got enough time for holiday events or a walk before sunset.
Columbia and the Midlands Climate
In the Midlands, including Columbia, it’s a bit colder than the coast. Highs usually land in the low to mid-50s °F (11–13 °C), and lows drop to the mid-30s °F (1–3 °C).
Rainfall is about the same as the coast, averaging 3 inches (75 mm) for December. Snow is possible, but it’s rare and usually light.
When cold fronts move in, you might wake up to frosty mornings and feel the chill in the evenings.
Columbia sits inland, so you don’t get the ocean’s moderating effect. The air is drier, and nights can feel colder than the numbers suggest.
If you visit at Christmas, bring layers to handle the daytime warmth and cooler nights.
Winds are lighter than on the coast, which helps make the cold more bearable for holiday lights or outdoor gatherings.
Greenville and Upstate Conditions
The Upstate region, including Greenville, gets the coldest Christmas weather in South Carolina. Highs stay in the upper 40s to low 50s °F (8–11 °C), and lows drop into the upper 20s to low 30s °F (-2 to 1 °C).
Snow is more likely here than anywhere else in the state. Greenville usually gets a few inches most winters, though it can really vary.
Even if it doesn’t snow, frost is common, and icy mornings might mess with travel plans.
Rain totals for December average 3–4 inches (75–100 mm). Higher elevation and distance from the ocean make the air feel extra crisp.
If you head up into the mountains, expect colder temps and more frequent snow. Pack warm clothes and be ready for possible winter driving if your Christmas plans include scenic routes or mountain towns.
Ocean and Water Temperatures in December
The ocean along the South Carolina coast stays cool in December, with average temperatures in the low 60s °F. Conditions shift a bit by location, but the Atlantic is usually too chilly for a long swim—though you can still enjoy some coastal activities.
Beach and Coastal Water Conditions
In December, the Atlantic off South Carolina averages 60–63°F (15–17°C). Places like Folly Beach, Isle of Palms, and Charleston see readings near the upper end, while Beaufort and southern spots can be a touch cooler.
Water temps can jump around, too. Folly Beach has ranged from 51°F to 70°F in recent years.
These swings depend on cold fronts, wind, and whatever weather comes through.
The cool water matches the mild coastal air, which usually sits in the mid-50s to low 60s°F during the day.
That makes the beach nice for walking, fishing, or just hanging out—even if you’re not swimming.
Swimming and Watersport Considerations
At these temps, swimming without a wetsuit gets uncomfortable fast. Most people find water below 70°F too cold for much time.
If you want to swim, you’ll need a wetsuit—especially for surfing, paddleboarding, or kayaking.
Surfers keep going through December since the Atlantic brings steady winter swells. A 3/2 mm or 4/3 mm wetsuit is pretty standard.
Kayakers and paddleboarders also wear thermal gear to avoid cooling off too quickly.
If you’re just after a casual beach day, the water’s best for wading or a quick dip. The cooler ocean is still great for boating and fishing, and lots of anglers love the active fish this time of year.
Weather Variability and Influencing Factors
Around Christmas, South Carolina’s weather can shift fast as air masses and moisture patterns change. You might wake up to a cold morning, only to get a mild afternoon, or see a stretch of dry days suddenly turn damp.
These changes usually come from cold fronts and rain-producing systems.
Cold Fronts and Temperature Swings
Cold fronts dropping down from the north bring the biggest changes in late December. When one moves through, temperatures can fall by 10–20°F in a day.
One afternoon might hit 60°F, but the next morning could be near freezing.
These swings happen because cold, dry air from the continent pushes out the warmer, humid Atlantic or Gulf air.
When the front arrives decides whether your Christmas feels crisp and chilly or mild enough for outdoor plans.
Winds shift, too. Before a front, they usually come from the southwest and bring in warmer air.
After the front, winds turn northwest and bring in cooler, drier conditions. You might also spot bursts of clouds or light rain.
If you travel across the state, you’ll feel these changes more in the Upstate and Piedmont, thanks to higher elevations.
Coastal areas bounce back faster, so their temperatures usually recover more quickly after a front moves through.
Afternoon Thunderstorms and Rain Events
You probably won’t see as many thunderstorms in December as you would in the summer, but they can still pop up when warm, humid Gulf air runs into a cold front. These storms usually show up scattered and don’t last long, but when they do, they can dump heavy rain and kick up some gusty winds.
Rain without thunder happens more often. Sometimes, a passing low-pressure system rolls through and brings steady showers that stick around for a few hours.
Every now and then, especially in the higher elevations of the Upstate, that rain might even turn into sleet or freezing rain—though you’re less likely to see that closer to the coast.
You’ll notice rainfall patterns can be pretty uneven. For example:
- Upstate: You’re more likely to get a wintry mix with your rain.
- Midlands: Usually just cool rain showers.
- Coastal region: Light rain that tends to clear out faster.
Even if storms don’t show up, extra clouds can keep daytime highs down and make evenings feel damp and chilly. So, you might want to pack for both wet and dry weather if you’re traveling for the holidays.
Outdoor Activities and Travel Tips for Christmas in South Carolina
South Carolina’s mild winter lets you enjoy festive events and get outside without dealing with the brutal cold other states have. Depending on where you are, the temperature and climate shape what you’ll want to do—from beach walks to mountain hikes.
Best Time to Visit South Carolina
December feels like one of the best times to get out and see South Carolina. Highs usually reach the mid-50s °F in the Upstate and low 60s °F near the coast. At night, temps drop into the 30s and 40s °F.
These conditions make outdoor activities pretty enjoyable, since you don’t have to worry about sweltering heat or big snowstorms.
If you’d rather avoid crowds, think about coming in early December before the holiday rush. Coastal towns like Charleston and Beaufort usually stay milder, which makes them perfect for walking tours or hanging out by the water.
The mountain areas tend to be cooler, so if you like brisk hikes or scenic drives, that could be your spot.
Winter humidity drops compared to summer, so being outside just feels nicer. Rain can still happen, but it’s usually short-lived instead of dragging on all day.
It’s smart to bring layers, a light jacket, and comfy shoes so you’re ready for whatever the weather decides to do.
Seasonal Outdoor Activities
Across the state, you’ll find a mix of holiday events and outdoor recreation. Many towns put on Christmas light displays, parades, and outdoor markets, and honestly, they’re pretty great in the mild weather.
Coastal regions usually host boat parades and waterfront festivals, adding a festive vibe to the season. It’s hard not to get swept up in the energy.
If you’re into nature, the Upstate has hiking trails in places like Table Rock State Park. The cooler air makes longer hikes actually enjoyable.
Birdwatching gets more interesting in winter because migratory species show up at coastal marshes and inland lakes. There’s always something new to spot.
Golf courses stay open all year, and December’s cooler temperatures make playing way more comfortable than in the summer. Walking tours through historic districts—like Charleston—just feel easier when you’re not sweating through your shirt.
For families, bigger cities set up outdoor ice rinks, so you can skate and feel festive without freezing. With all these seasonal attractions and the state’s natural scenery, you’ll have a bunch of outdoor options during Christmas.