Average Temperature In Charleston SC: Monthly Weather Insights And Climate Averages [Updated On 2025]

Charleston, SC has an average monthly temperature of 78°F to 82°F. The average daily maximum temperature ranges from 88°F to 91°F in summer. Winter brings cooler temperatures, generally below 50°F. Temperatures rarely exceed 100°F. This pattern aligns with Charleston’s humid subtropical climate.

Summer brings higher averages. June temperatures reach around 80°F (27°C), peaking in July at 85°F (29°C). High humidity accompanies these warm months, often creating a muggy feel. The average temperature in Charleston, SC begins to dip in late August as fall approaches, returning to the mid-70s°F (approximately 24°C) by September.

In winter, temperatures decline sharply. December sees averages around 54°F (12°C). Precipitation is fairly consistent year-round, with rain spikes in late summer. This climatic pattern influences both the local flora and outdoor activities.

Understanding the average temperature in Charleston, SC lays the groundwork for exploring the city’s unique weather events. The next section will examine seasonal extremes, such as hurricanes and cold fronts, further detailing how these phenomena affect the Charleston climate.

Table of Contents

What Is the Average Temperature in Charleston SC Throughout the Year?

The average temperature in Charleston, SC, indicates the typical weather conditions experienced throughout the year. This figure reflects the overall climate pattern, which includes both high and low temperature ranges across each season.

The National Weather Service states that the average temperature is a critical measure used in climatology. It aids in understanding regional weather patterns and forecasting.

Charleston experiences a humid subtropical climate with hot summers and mild winters. Average high temperatures in summer can reach around 90°F (32°C), while winter lows average about 40°F (4°C). Seasonal humidity levels are typically high.

According to the National Oceanic and Atmospheric Administration (NOAA), averages can vary based on proximity to the Atlantic Ocean and local geographical features. Charleston’s coastal position influences its more temperate climate compared to inland areas.

Factors contributing to temperature variations include ocean currents, humidity, and seasonal changes. Urban development also impacts local temperatures through the urban heat island effect.

Data from NOAA shows that Charleston averages approximately 65°F (18°C) annually. This figure can project increasing temperatures due to climate change, indicating potential challenges for the region.

Rising temperatures can affect agriculture, tourism, and health. Heat-related illnesses may increase, and ecosystems could be disrupted by changing weather patterns.

Examples include heatwaves leading to increased power demand and impacts on crops sensitive to temperature changes, such as peaches and strawberries.

To address temperature-related challenges, the Environmental Protection Agency recommends promoting green spaces, enhancing energy efficiency in buildings, and supporting public transport.

Specific strategies include planting trees, utilizing reflective materials for roofing, and implementing renewable energy sources to reduce heat production and urban temperatures.

How Do Monthly Average Temperatures in Charleston SC Compare?

Monthly average temperatures in Charleston, SC, vary significantly throughout the year, with warm summers and mild winters characterizing its climate. The following points explain these temperature variations in more detail:

January is the coldest month, with average temperatures around 43°F (6°C) at night and 57°F (14°C) during the day. This information is based on weather data from the National Oceanic and Atmospheric Administration (NOAA, 2021).
July is the warmest month, featuring average temperatures of about 73°F (23°C) at night and 91°F (33°C) during the day. These figures are reported through historical weather records from Weather.com (2022).
Spring brings moderate temperatures. March averages about 50°F (10°C) at night and 65°F (18°C) during the day. By May, temperatures rise to around 63°F (17°C) at night and 83°F (28°C) during the day (NOAA, 2021).
Fall also shows a gradual temperature decline. In September, average temperatures linger around 72°F (22°C) at night and 86°F (30°C) during the day. By November, these averages drop to 46°F (8°C) at night and 63°F (17°C) during the day (Weather.com, 2022).
Humidity plays a role in temperature perception. Charleston experiences high humidity levels, particularly in the summer, making the air feel warmer. The average relative humidity in July can reach up to 90% (National Weather Service, 2023).
Rainfall patterns affect temperatures. The wettest months are usually August and September, with an average of 6-7 inches of rainfall. Precipitation can lead to cooler daytime temperatures and affect the overall climate comfort (NOAA, 2021).

In summary, Charleston, SC experiences a diverse climate with hot summers, mild winters, and distinct seasonal variations in temperature and humidity.

What Is the Average Temperature in Charleston SC in January?

The average temperature in Charleston, SC, during January is around 50°F (10°C). This value indicates the typical climate conditions of the area for that month, encompassing both high and low temperature ranges.

According to the National Oceanic and Atmospheric Administration (NOAA), average temperatures are calculated based on historical weather data. NOAA is a trustworthy resource for climate and weather data in the United States.

January temperatures in Charleston display mild winters compared to many other regions. Daytime highs usually reach around 57°F (14°C), while nighttime lows fall to about 41°F (5°C). This comfortable winter climate encourages various outdoor activities.

The Weather Channel states that Charleston experiences a humid subtropical climate, where winters are characterized by cool temperatures and moderate humidity. This climate contributes to pleasant conditions for residents and visitors.

These average temperatures are influenced by factors such as latitude, ocean currents, and regional geography. The nearby Atlantic Ocean mitigates temperature extremes, resulting in relatively mild winters.

Data from the NOAA shows that from 1991 to 2020, the average January temperature in Charleston has shown slight variations, typically ranging between 46°F (8°C) and 54°F (12°C). Future projections suggest continued mild winters due to climate trends.

Mild winter temperatures can impact energy consumption, outdoor tourism, and local agriculture. Pleasant weather encourages tourism, boosting the local economy.

The health aspect includes reduced cold-related illnesses during milder winters. Environmentally, these temperatures can affect local ecosystems and wildlife.

For example, agricultural practices can benefit from warmer winters, allowing for extended growing seasons. Warmer temperatures can also mitigate heating costs for homes and businesses.

To address potential fluctuations in temperature patterns, experts recommend adopting energy-efficient solutions, such as home insulation and renewable energy sources. The U.S. Green Building Council advocates for sustainable building practices to manage energy consumption effectively.

Strategies like implementing energy-efficient appliances and promoting public transportation can further help mitigate impacts from temperature variations within the Charleston area.

What Is the Average Temperature in Charleston SC in July?

The average temperature in Charleston, SC, in July typically ranges from 75°F to 90°F. This period is characterized by hot, humid summer weather, with high temperatures often reaching their peak.

According to the National Oceanic and Atmospheric Administration (NOAA), July is usually the warmest month in Charleston, SC. The climate data is collected through extensive meteorological observations and analyses.

The warm temperatures in July can be attributed to several factors. The city experiences a subtropical climate, leading to high humidity and summer heat. Coastal proximity further influences the temperature, providing a moderating effect but also contributing to elevated humidity levels.

The Weather Channel highlights that average high temperatures in July can frequently exceed 90°F, while nighttime temperatures remain in the mid-70s°F. Such warm conditions significantly impact local weather patterns and daily life.

Contributing factors to the hot temperature include geographical location, ocean currents, and prevailing winds. Global climate patterns, such as El Niño, may also influence local temperature ranges.

Data from Weather Atlas shows that July averages around 8.2 hours of sunshine per day, with approximately 5.4 inches of rainfall. This rainfall can alleviate some heat but also increases humidity.

The hot temperature can impact health, environment, society, and the economy. It may lead to heat-related illnesses and strain energy resources due to increased air conditioning use.

Increased temperatures can affect outdoor activities, tourism, and agricultural practices. For instance, extreme heat may diminish crop yields or alter pest patterns.

To manage high temperatures, experts recommend implementing heat action plans, enhancing public health outreach, and promoting energy-efficient practices. Urban planning that increases green spaces can also help mitigate urban heat.

Strategies such as reflective roofing, smart landscaping that minimizes heat absorption, and community awareness programs can reduce the effects of heat. These practices improve resilience against rising temperatures in urban areas.

What Are the Seasonal Weather Trends in Charleston SC?

The seasonal weather trends in Charleston, SC, include mild winters, hot summers, and variable temperatures in spring and fall.

Winter: Mild temperatures with occasional cold fronts.
Spring: Warm temperatures with increasing humidity and rainfall.
Summer: Hot and humid conditions with frequent thunderstorms.
Fall: Mild weather with decreasing humidity and temperatures.

These trends reflect the overall climate characteristics of the region while also showing some variations that can occur based on specific weather patterns.

Winter: Winter in Charleston, SC features mild temperatures typically ranging from 40°F to 60°F. Cold fronts can occasionally bring temperatures down to freezing. According to the National Weather Service, January is the coldest month, averaging around 43°F. While snow is rare, it can occur, as evidenced by a light snowfall recorded in January 2018.
Spring: Spring sees a transition to warmer weather, with temperatures ranging from 50°F to 80°F. March often starts cool, but by May, average highs can reach 85°F. Rainfall increases during this season, helping to rejuvenate the lush vegetation characteristic of the area. The Charleston City Paper notes the blooming of azaleas and dogwoods as vibrant indicators of this season’s arrival.
Summer: Summer is characterized by hot and humid conditions. Average high temperatures typically range from 85°F to 90°F, with heat indices exceeding 100°F on particularly humid days. Rainfall is frequent in the form of thunderstorms, primarily in the afternoon. According to NOAA, July is the hottest month, often leading to heat advisories.
Fall: Fall weather in Charleston brings mild temperatures, generally between 50°F and 80°F, with decreasing humidity. The summer humidity dissipates, creating comfortable conditions ideal for outdoor activities. According to Weather.com, this season also witnesses the hurricane season tapering off, making September a time of caution but lovely weather thereafter.

Overall, Charleston’s seasonal weather trends effectively influence the lifestyle, tourism, and local activities throughout the year.

How Do Seasonal Changes Affect Temperature in Charleston SC?

Seasonal changes significantly influence temperature in Charleston, SC, resulting in distinct weather patterns characterized by warm summers, mild winters, and transitional spring and fall seasons.

Summer heat: Summers in Charleston are typically hot. Average high temperatures often reach around 90°F (32°C) in July. The humidity levels can exceed 70%, making it feel even warmer. The combination of high temperatures and humidity can lead to heat indices that feel significantly higher.
Winter mildness: Winters in Charleston are generally mild compared to many areas of the United States. Average low temperatures in January hover around 39°F (4°C). Frost occurs infrequently, and snowfall is rare. This mildness allows for outdoor activities throughout the winter months.
Spring transition: Spring, specifically March to May, shows a gradual increase in temperature. Average highs change from approximately 65°F (18°C) in March to about 80°F (27°C) in May. The season also experiences blooming flowers and increased rainfall, which can impact humidity levels.
Fall transition: Fall follows a similar pattern to spring. Average temperatures decline from around 81°F (27°C) in September to about 65°F (18°C) in November. This season is characterized by lower humidity and comfortable temperatures, making it ideal for outdoor events.
Precipitation patterns: Seasonal changes also affect rainfall. The summer months typically receive the highest precipitation, averaging around 6 inches (15 cm) per month, primarily due to afternoon thunderstorms. Conversely, the late fall and winter months usually see lower rainfall levels.

These temperature variations directly impact the local environment and influence daily life in Charleston. Residents experience seasonal activities such as beach outings in summer and outdoor festivals in spring and fall.

In What Ways Does Humidity Impact the Average Temperature in Charleston SC?

Humidity impacts the average temperature in Charleston, SC in several ways. First, humidity refers to the amount of moisture in the air. High humidity levels can make the air feel warmer than it actually is. This phenomenon occurs because moisture in the air slows the evaporation of sweat from the skin, which is the body’s natural cooling mechanism.

Second, humidity can influence temperature fluctuations. During the day, humid air can trap heat, leading to higher daytime temperatures. At night, this same moisture can prevent rapid cooling, resulting in milder nighttime temperatures compared to drier regions.

Third, the seasonal patterns of humidity create variations in average temperatures. Charleston experiences high humidity in the summer months. This consistent moisture contributes to hotter summer average temperatures. Conversely, during the winter months, humidity levels tend to drop, leading to cooler average temperatures.

In summary, high humidity in Charleston elevates perceived temperatures, affects daily and nightly temperature fluctuations, and influences seasonal average temperatures. These factors combine to create a unique climate experience affecting how residents and visitors perceive temperature in the region.

What Are the Historical Weather Averages for Charleston SC?

The historical weather averages for Charleston, SC, indicate that the city experiences a warm subtropical climate. The average temperatures fluctuate across the seasons, with mild winters and hot summers.

Average Monthly Temperatures:
– January: 48°F (9°C)
– April: 65°F (18°C)
– July: 80°F (27°C)
– October: 70°F (21°C)
Average Precipitation:
– Annual average: 52 inches (132 cm)
– Wettest months: August and September
Humidity Levels:
– Average annual relative humidity: 70%
– Peak humidity in summer months
Seasonal Variations:
– Spring: Mild and pleasant
– Summer: Hot and humid
– Fall: Warm with cooler nights
– Winter: Mild with occasional cold snaps

The climate data serves as a baseline for understanding weather trends and fluctuations in Charleston, SC.

Average Monthly Temperatures:
The average monthly temperatures in Charleston, SC, characterize each season distinctly. January sees an average low of 48°F, marking winter’s mildness. By April, temperatures rise to about 65°F, warming up for spring. July reaches peak summer warmth with averages around 80°F. In October, temperatures cool to about 70°F, signaling fall.
Average Precipitation:
The average annual precipitation for Charleston is about 52 inches. The wettest months typically occur in August and September due to tropical storms and hurricanes. This seasonal variation highlights the importance of water management in the region.
Humidity Levels:
Charleston maintains an average annual relative humidity of 70%. The humidity reaches its peak during the summer months, leading to an increased heat index, which can make temperatures feel hotter than they are.
Seasonal Variations:
Seasonal variations greatly impact the lifestyle in Charleston. Spring is mild and pleasant, making it popular for outdoor events. Summer brings high temperatures and humidity. Fall provides warmer weather that transitions to cooler nights, while winter remains mild, sometimes allowing for brief cold snaps.

These weather averages help residents and visitors prepare for activities and events throughout the year.

How Have Average Temperatures Changed Over the Years in Charleston SC?

Average temperatures in Charleston, SC have shown a gradual increase over the years. Historical data indicates a rise in temperatures primarily due to climate change. The average yearly temperature in the late 20th century was approximately 64°F. By the early 2020s, it had increased to about 67°F.

Seasonally, summers have become hotter, with average high temperatures reaching around 90°F. Winters have also warmed, now averaging about 45°F.

This upward trend correlates with global increases in carbon dioxide levels and other greenhouse gases. These changes impact local weather patterns, resulting in more frequent heatwaves and altered precipitation patterns.

Therefore, the evolution of average temperatures in Charleston reflects broader climate trends affecting many regions globally.

How Do Average Temperatures in Charleston SC Compare to Nearby Cities?

Average temperatures in Charleston, SC, are generally warmer than those in nearby cities like Savannah, GA, and Wilmington, NC, reflecting its subtropical climate. This comparison highlights temperature variations based on geographical location and regional weather patterns.

Charleston’s climate is classified as humid subtropical. This results in hot summers and mild winters. The following points detail how Charleston’s average temperatures compare to its neighbors:

Summer Temperatures: Charleston typically experiences summer temperatures averaging around 90°F (32°C). In contrast, Savannah averages about 92°F (33°C), while Wilmington records around 88°F (31°C), making Charleston slightly cooler than Savannah but warmer than Wilmington during the peak summer months.
Winter Temperatures: Winter temperatures in Charleston average around 50°F (10°C). Meanwhile, Savannah’s average winter temperature is about 48°F (9°C), and Wilmington is also similar at approximately 47°F (8°C). Therefore, Charleston tends to be a bit warmer in winter compared to both nearby cities.
Annual Averages: On average, Charleston records an annual temperature of around 65°F (18°C). Savannah’s annual average is slightly higher at 67°F (19°C), and Wilmington’s is lower at about 62°F (17°C). This indicates that Charleston is somewhat in the middle when considering the yearly averages.
Temperature Extremes: Charleston has seen maximum temperatures reach 100°F (38°C) during heat waves. Savannah occasionally reaches similar highs, but Wilmington, due to its coastal proximity, experiences slightly moderated highs, often peaking at around 95°F (35°C).
Humidity Factors: Charleston’s humidity can affect how temperatures feel. The relative humidity frequently averages between 70-80% in the summer, creating a warmer sensation compared to Wilmington, where humidity may be slightly lower.

These factors collectively illustrate how the climate in Charleston, SC, remains comparatively warm throughout the year, specifically when juxtaposed with nearby cities like Savannah and Wilmington.

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