Average Weather In South Carolina: Monthly Averages, Climate Insights, And Rainfall [Updated On: September 2025]

South Carolina has a humid subtropical climate. The annual average temperature ranges from the mid-50s in the Blue Ridge Mountains to the low-60s in coastal areas. Winter temperatures typically vary from 34°F to 90°F. Key cities like Charleston, Columbia, and Greenville experience different seasonal variations and humidity levels.

Monthly, South Carolina sees rainfall distributed fairly evenly across the year. The wettest months are often March and July, averaging 4 to 5 inches of rain. Winter precipitation is usually light, with January receiving around 3 inches. Humidity levels peak during summer, contributing to the heat index. This results in sweltering conditions, particularly in late July.

As spring approaches, temperatures rise, inviting residents and visitors to enjoy nature. The flowers bloom, and the state’s lush greenery becomes vibrant. Fall offers a respite, with cooler temperatures and stunning foliage views.

Understanding the average weather in South Carolina is essential for planning activities and travel. Awareness of rainfall patterns helps in organizing outdoor events. Next, we will explore regional climatic variations, which showcase the diversity within South Carolina’s landscapes.

Table of Contents

What Is the Average Weather in South Carolina Throughout the Year?

The average weather in South Carolina throughout the year is characterized by a humid subtropical climate, which features hot summers and mild winters. According to the National Oceanic and Atmospheric Administration (NOAA), this climate type typically includes wet summers and drier winters, affecting regional weather patterns.

The NOAA classifies South Carolina’s climate as humid subtropical, focusing on temperature and precipitation patterns. The southeastern U.S. climate is influenced by the Atlantic Ocean, leading to a variety of weather conditions year-round.

In South Carolina, summer temperatures often reach the high 80s°F to low 90s°F. Winter temperatures generally range from the low 30s°F to mid-50s°F. Rainfall averages between 45 to 50 inches annually, with peak precipitation during late spring and summer.

Factors such as geography, ocean currents, and seasonal shifts contribute to this climate. The state’s varying elevation and coastal location create microclimates that result in localized weather extremes.

During the summer, humidity levels can exceed 90%, contributing to heat indices that feel much hotter. The South Carolina Drought Response Plan notes increased rainfall variability due to climate change, potentially leading to heightened weather extremes.

Overall, this climate affects agriculture, tourism, and public health. Crop yields can fluctuate with changing precipitation patterns, while heat-related illnesses may rise during hot months.

Specific impacts include increased energy demand from air conditioning and altered tourism patterns, affecting local economies significantly.

To address climate-related issues, the South Carolina Climate Adaptation Plan recommends improving infrastructure for stormwater management and investing in heat-resilient crops. Implementing energy-efficient practices can also help mitigate heat impacts and reduce greenhouse gas emissions.

What Are the Monthly Temperature Averages in South Carolina?

The monthly temperature averages in South Carolina typically range from mild winters to hot summers. Average temperatures vary month to month, reflecting seasonal changes.

January: 38°F – 57°F
February: 40°F – 60°F
March: 45°F – 66°F
April: 53°F – 75°F
May: 61°F – 83°F
June: 68°F – 90°F
July: 72°F – 92°F
August: 71°F – 91°F
September: 66°F – 85°F
October: 54°F – 75°F
November: 43°F – 65°F
December: 38°F – 58°F

These averages provide a general overview, but variations exist based on specific locations within the state.

January: January in South Carolina averages between 38°F and 57°F. It is the coldest month, with temperatures occasionally dipping near freezing in the northern areas. January is characterized by a mix of sunny days and chilly nights.
February: February averages range from 40°F to 60°F. Temperatures begin to rise slightly, signaling the end of winter. Cold fronts can still intrude, resulting in occasional colder days.
March: March averages span from 45°F to 66°F. This month marks the transition to spring. Days become noticeably warmer, but nights can still be cool.
April: April temperatures range from 53°F to 75°F. Spring blooms, and humidity begins to increase. It is a popular month for outdoor activities.
May: Average temperatures in May vary from 61°F to 83°F. Higher humidity levels and consistent warmth set the stage for summer, making it ideal for beachgoers.
June: In June, temperatures range from 68°F to 90°F. This month is characterized by hot weather and intermittent rain, beginning the peak summer season.
July: July averages between 72°F and 92°F. It is often the hottest month. High humidity may make the heat feel more intense.
August: August sees temperatures from 71°F to 91°F. The heat remains prevalent, and afternoon thunderstorms can occur.
September: September temperatures average from 66°F to 85°F. The weather begins to cool off, but it can still feel hot early in the month.
October: October ranges from 54°F to 75°F. Cooler temperatures mark the arrival of fall foliage, drawing many to enjoy outdoor activities.
November: November averages range from 43°F to 65°F. The month cools down significantly, and frost becomes possible towards the end of the month.
December: December averages from 38°F to 58°F. The state experiences its coldest weather, with potential snowfall in the upper regions.

Understanding these averages can help residents and visitors plan their activities throughout the year. Local climate variations may have implications for agriculture, tourism, and everyday life in South Carolina.

What Are the Average Highs and Lows for Each Month in South Carolina?

The average highs and lows for each month in South Carolina vary significantly throughout the year, reflecting the state’s diverse climate.

January: High 53°F, Low 32°F
February: High 58°F, Low 35°F
March: High 65°F, Low 42°F
April: High 73°F, Low 49°F
May: High 81°F, Low 58°F
June: High 88°F, Low 66°F
July: High 91°F, Low 70°F
August: High 90°F, Low 69°F
September: High 84°F, Low 64°F
October: High 75°F, Low 51°F
November: High 64°F, Low 40°F
December: High 55°F, Low 33°F

Different regions in South Carolina can experience varying temperatures and precipitation levels. Coastal areas tend to have milder winters and hotter summers, while the interior may experience more temperature extremes.

Detailed Monthly Average Temperatures:
– January: The average high of 53°F and a low of 32°F mark the coldest month in South Carolina. This month can also feature frost, especially in the mountainous regions.
– February: Slightly warmer, February records an average high of 58°F and a low of 35°F. As spring approaches, temperatures begin to rise and the chance of frost decreases, making it a transitional month.
– March: With highs of 65°F and lows of 42°F, March signals the start of spring. Outdoor activities become more popular as the weather becomes milder.
– April: April features an average high of 73°F and a low of 49°F. The weather is typically pleasant, leading to an increase in outdoor festivals and events.
– May: May’s average high of 81°F and low of 58°F marks the transition into summer. Rainfall begins to increase, contributing to lush green landscapes.
– June: June reaches an average high of 88°F and a low of 66°F. This month often brings higher humidity and summer thunderstorms.
– July: July is the hottest month, with averages of 91°F and 70°F. Residents often cope with heat advisories due to the combination of high temperatures and humidity.
– August: Similar to July, August records an average high of 90°F and a low of 69°F. The heat persists, but the month may also experience the effects of late summer tropical storms.
– September: Average temperatures drop to 84°F high and 64°F low, marking the start of fall. This month often sees hurricanes or tropical storms affecting the coast.
– October: October offers an average high of 75°F and a low of 51°F. The fall foliage attracts visitors, as cooler weather arrives.
– November: November averages drop to 64°F high and 40°F low. With the cooling temperatures, outdoor activities shift toward harvest celebrations.
– December: December has an average high of 55°F and a low of 33°F, concluding the year with cooler nights. Holiday festivities often bring people outdoors despite the chill.

These averages illustrate South Carolina’s varied and changing climate throughout the year, influencing both the lifestyle and agriculture in the region.

How Do Seasonal Changes Affect Temperature in South Carolina?

Seasonal changes significantly affect temperature in South Carolina by causing noticeable variations between warmer summers and cooler winters, influenced by geographic location and climatic factors.

During summer, temperatures in South Carolina typically range from the high 80s to low 90s Fahrenheit (around 31 to 34 degrees Celsius). This warmth is driven by several factors:

Latitude: South Carolina lies in the southeastern U.S. at a latitude of approximately 30 to 35 degrees north. This position means it receives more direct sunlight during summer.
Humidity: High humidity levels, often exceeding 70%, contribute to the ‘heat index’ making it feel even hotter than the actual temperature. The National Weather Service reports that heat index values can rise significantly due to humidity.
Warm air masses: Warm air masses from the Gulf of Mexico move northward, causing increased temperatures during summer months.

In contrast, winter temperatures generally range from the mid-30s to mid-50s Fahrenheit (around 2 to 13 degrees Celsius):

Cold fronts: Occasional cold fronts can bring chilly air from the north, resulting in temperature drops. A study by the Southeast Regional Climate Center (2018) highlights this pattern, where colder air masses can temporarily lower temperatures sharply.
Regional geography: The state’s coastal areas experience milder winters, while the upstate mountains can see snow and significantly cooler temperatures. Reports from the National Oceanic and Atmospheric Administration (NOAA) show average snowfall in higher elevations can reach 5 inches or more annually.
Duration of daylight: Shorter daylight hours in winter lead to less solar heating, which affects overall temperature.

Seasonal changes also affect precipitation patterns, contributing to temperature fluctuations:

Summer storms: Thunderstorms are common during hot summer months, providing brief relief from heat through cooling rains.
Winter precipitations: Rainfall is infrequent in winter compared to summer, resulting in generally drier, cooler days.

Overall, the interaction of these seasonal changes and climatic conditions determines the temperature patterns experienced throughout South Carolina.

What Are the Rainfall Patterns in South Carolina?

The rainfall patterns in South Carolina are characterized by a moderate and humid subtropical climate. The state experiences significant rainfall throughout the year, with summer being the wettest season.

Seasonal Distribution of Rainfall
Average Annual Rainfall
Rainfall Variability
Extreme Weather Events
Impact on Agriculture
Regional Differences in Rainfall

The following sections will provide a detailed explanation of each aspect of South Carolina’s rainfall patterns.

Seasonal Distribution of Rainfall:
Seasonal distribution of rainfall in South Carolina indicates varying amounts throughout the year. Rainfall peaks during the summer months, particularly June through August. During this period, thunderstorms are common, contributing to the overall precipitation. According to the National Weather Service, summer typically accounts for approximately 40% of the annual rainfall.
Average Annual Rainfall:
Average annual rainfall in South Carolina varies across regions but generally ranges from 40 to 60 inches. The coastal areas tend to receive more rain compared to the northwest part of the state. This average is significantly influenced by tropical systems, as noted by the NOAA, where historical data shows that some areas experience upwards of 70 inches during particularly wet years.
Rainfall Variability:
Rainfall variability refers to fluctuations in precipitation amounts from year to year. In South Carolina, this can lead to droughts in some years and floods in others. The state has faced significant droughts, impacting water supply and agricultural practices. A 2018 study by the South Carolina Water Resources Commission highlighted that rainfall variability can affect seasonal crop yields, requiring farmers to adapt their planting strategies.
Extreme Weather Events:
Extreme weather events, including hurricanes and tropical storms, significantly impact South Carolina’s rainfall patterns. These events often result in heavy downpours leading to flash flooding. The aftermath of Hurricane Florence in 2018 exemplified this, where some areas received over 30 inches of rain, drastically changing the local landscape and affecting infrastructure.
Impact on Agriculture:
The impact of rainfall patterns on agriculture in South Carolina is profound. Consistent rainfall is crucial for crops like cotton and soybeans. However, too much rain can lead to soil erosion and crop damage. The USDA states that farmers must implement water conservation practices and select crop varieties that can withstand both drought and excess moisture.
Regional Differences in Rainfall:
Regional differences in rainfall across South Carolina contribute to localized climate effects. The coastal plain typically receives more rain compared to the upstate region. Consequently, this variability affects regional ecosystems and biodiversity. According to a study by the South Carolina Department of Natural Resources, different rainfall levels contribute to habitat differences that can influence wildlife behavior and distribution.

When Is the Wettest Month and Driest Month in South Carolina?

The wettest month in South Carolina is typically August, while the driest month is usually December. August experiences heavy rainfall due to summer storms, while December sees reduced precipitation as the weather stabilizes into winter conditions.

How Does Rainfall Differ Across the Regions of South Carolina?

Rainfall differs across the regions of South Carolina due to geographical and climatic variations. The coastal region experiences more rainfall than the inland areas. Charleston, located on the coast, averages about 50 inches of rainfall annually. In contrast, regions like the Upstate, around Greenville, receive around 40 inches per year. The Midlands, including Columbia, fall in between with approximately 45 inches of rain annually.

Seasonal patterns also affect rainfall distribution. Summer months see heavy thunderstorms, which increase rainfall totals in all regions. However, coastal areas may experience tropical storms and hurricanes, resulting in sporadic, heavy downpours.

Overall, rainfall amounts and patterns vary but generally decrease from the coast to the mountains. Understanding these differences helps in planning for agriculture, water conservation, and urban development in South Carolina.

What Is the Climate Classification of South Carolina?

South Carolina has a humid subtropical climate, characterized by hot summers and mild winters. This climate classification indicates significant rainfall year-round and high humidity levels, particularly during summer months.

The National Oceanic and Atmospheric Administration (NOAA) defines a humid subtropical climate as one that generally has short, mild winters and long, hot summers with high humidity. This definition is widely accepted among climate scientists and meteorologists.

In South Carolina, summer temperatures can average between 80°F and 90°F, while winter temperatures typically range from 30°F to 50°F. Additionally, the state experiences around 40-50 inches of rainfall annually, contributing to its lush vegetation.

According to the Köppen Climate Classification system, South Carolina falls under the “Cfa” category, which denotes a humid subtropical climate without a dry season. The American Meteorological Society supports this classification with detailed climate studies.

Contributing factors to South Carolina’s climate include its geographic location, proximity to the Atlantic Ocean, and elevation. These elements influence temperature patterns and precipitation levels.

Data from the South Carolina State Climatology Office indicates that the state has seen a 1.5°F increase in average temperature over the past century. Future projections suggest the state may warm an additional 2°F to 4°F by 2050.

Humidity and temperature extremes can lead to agricultural challenges, increased energy demands, and health issues like heat-related illnesses. Additionally, heavy rainfall may cause flooding, affecting infrastructure.

The South Carolina Department of Health and Environmental Control notes that climate impacts may worsen air quality and increase vector-borne diseases, affecting public health. Economic sectors like agriculture could face reduced crop yields due to extreme weather.

Sustainable agricultural practices, improved water management, and energy efficiency measures are recommended to mitigate these climate impacts. Experts suggest investing in green infrastructure and adopting climate-resilient crops.

Strategies such as increasing tree coverage, using drought-resistant plants in landscaping, and enhancing stormwater management systems can help address these climate challenges effectively.

How Does Humidity Impact Weather Conditions in South Carolina?

Humidity significantly impacts weather conditions in South Carolina. High humidity levels contribute to increased temperatures, making the air feel warmer than it actually is. This leads to discomfort for residents and a higher demand for air conditioning.

Moreover, humidity affects precipitation patterns. High humidity levels often result in cloudy skies and increased chances of rain. In South Carolina, summer months typically see elevated humidity, leading to afternoon thunderstorms.

Humidity also influences the development of severe weather events. Higher humidity can intensify storms and increase the likelihood of heavy rainfall, flash flooding, and tornadoes.

Understanding humidity’s role helps residents prepare for weather changes. It helps in planning outdoor activities and ensuring safety during severe weather events. Overall, humidity plays a crucial role in shaping South Carolina’s weather conditions.

What Should Tourists Expect Weather-wise When Visiting South Carolina?

Tourists visiting South Carolina should expect a varied climate characterized by warm summers, mild winters, and distinct seasons.

Key Weather Expectations:
1. Hot and humid summers
2. Mild winters
3. Sudden thunderstorms
4. Hurricane season risks
5. Best visiting seasons

To delve deeper into these weather expectations, we can examine each point in detail.

Hot and Humid Summers: Tourists can expect hot and humid summers in South Carolina. The average temperature during this season ranges from the mid-80s to low 90s Fahrenheit. Humidity levels can make it feel several degrees warmer. The summer heat can create a vibrant atmosphere for outdoor activities but may lead to discomfort for some visitors.
Mild Winters: The winters in South Carolina are generally mild, with average temperatures ranging from the low 30s to mid-50s Fahrenheit. Snow is rare, and the state experiences occasional cold snaps. This season attracts visitors seeking to escape harsher winter climates found in other regions.
Sudden Thunderstorms: Sudden thunderstorms are common, especially in summer. These storms can bring heavy rain, lightning, and gusty winds. Tourists should be prepared for short but intense rain showers that may disrupt outdoor plans.
Hurricane Season Risks: South Carolina faces risks from hurricanes and tropical storms mainly from June to November. Tourists should monitor weather forecasts during this period and be aware of evacuation routes and safety measures.
Best Visiting Seasons: The best times to visit South Carolina are during the spring (March to May) and fall (September to November). During these seasons, temperatures are pleasant, and humidity is lower, making it ideal for exploring the state’s natural beauty and cultural attractions.

Understanding these weather patterns can enhance a visitor’s experience and help them plan activities accordingly.

How Do Wind and Sunshine Hours Influence Outdoor Activities in South Carolina?

Wind and sunshine hours significantly influence outdoor activities in South Carolina by affecting weather comfort, visibility, and thermal conditions.

Wind impacts outdoor activities in several ways:

Comfort Level: Wind can enhance the cooling effect during hot days, making it more comfortable for outdoor events. According to the National Weather Service, a breeze can lower the perceived temperature significantly.
Safety Considerations: High winds can pose safety risks during outdoor activities. For example, wind can make it difficult to participate in sports like sailing or flying kites.
Activity Suitability: Certain activities are more enjoyable or feasible with wind. For instance, windsurfing and kiteboarding are favored in breezy conditions, attracting enthusiasts.

Sunshine hours affect outdoor activities by influencing:

Seasonal Variability: Longer sunshine hours in spring and summer encourage more outdoor activities. Data from the National Oceanic and Atmospheric Administration (NOAA) show that daily average sunshine can range from 8 to 10 hours in July.
Health Benefits: Exposure to sunlight facilitates vitamin D production in the body, promoting health and wellbeing. A study published in the Journal of Clinical Endocrinology & Metabolism (Lehmann et al., 2017) highlights the importance of sunlight for calcium metabolism.
Scheduling Events: High levels of sunshine can determine the scheduling of events, festivals, and family outings. Organizers consider forecasted sunshine to maximize participation and enjoyment.

Overall, both wind and sunshine are critical factors that influence the type and frequency of outdoor activities in South Carolina. Their impact varies based on season, location, and type of activity.

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