Myrtle beach sept weather – Myrtle Beach September weather is marked by warm temperatures and humidity, making it a popular destination for tourists. The average high temperature in September is around 84°F (29°C), while the average low temperature is around 68°F (20°C). However, the Atlantic hurricane season, which peaks in September, can bring strong winds, heavy rainfall, and storm surges to the area.
The coastal town of Myrtle Beach, South Carolina, experiences a subtropical climate, with September being one of the wettest months of the year. The area receives an average of 7 inches of rainfall in September, with most of it coming from tropical storms and hurricanes.
Understanding September Weather Patterns in Myrtle Beach
As one of the most popular tourist destinations in the United States, Myrtle Beach in South Carolina experiences a unique set of weather patterns throughout the year. The city’s location on the Atlantic coast makes it susceptible to the influence of ocean temperatures and the Atlantic hurricane season. Understanding the historical temperature fluctuations and the impact of the hurricane season on average temperature and precipitation levels is crucial for planning activities and vacations in Myrtle Beach during September.
September is a transitional month in Myrtle Beach, marking the end of the summer season and the beginning of the fall season. Historically, the city experiences mild temperatures during this period, with average highs ranging from 84°F (29°C) to 87°F (31°C) and average lows ranging from 65°F (18°C) to 70°F (21°C). However, these temperatures can vary significantly from year to year, influenced by the Atlantic Ocean’s temperature and the potential presence of hurricanes in the area.
Historical Temperature Fluctuations in September
- According to data from the National Centers for Environmental Information (NCEI), the average high temperature in Myrtle Beach during September has been steadily increasing over the past few decades. This trend is consistent with the overall warming pattern observed in the southeastern United States.
- The average low temperature in Myrtle Beach during September has also shown a slight increase over the years, with a more significant variability observed in extreme temperature events.
- The hottest temperature ever recorded in Myrtle Beach during September was 98°F (36.7°C) on September 1, 1946, while the coldest temperature was 49°F (9.4°C) on September 29, 1954.
The Atlantic hurricane season, which runs from June 1 to November 30, can significantly impact the weather in Myrtle Beach during September. As a major hurricane landing area, Myrtle Beach is often affected by the remnants of these storms, which can bring heavy rainfall, powerful winds, and storm surges to the area.
Impact of the Atlantic Hurricane Season on Weather in September
- According to data from the National Hurricane Center (NHC), Myrtle Beach has been affected by several major hurricanes during the month of September over the years. These storms have brought significant rainfall and wind damage to the area.
- The presence of hurricanes in the area can lead to a significant increase in precipitation levels, with some storms producing up to 10 inches (25 cm) of rainfall in a short period.
- The storm surges caused by hurricanes can also lead to coastal flooding and erosion in Myrtle Beach, affecting the area’s beachfront properties and tourist attractions.
The intersection of the Atlantic hurricane season and the mild temperatures of September makes it an unpredictable and potentially volatile time for weather in Myrtle Beach. Visitors and residents alike should be prepared for the possibility of storms and associated weather events during this period.
The best time to visit Myrtle Beach without the risk of hurricanes is from September 15 to October 15, when the city experiences mild temperatures and lower humidity. However, this does not guarantee a storm-free experience, and visitors should always be prepared for the possibility of inclement weather.
Average High and Low Temperatures in Myrtle Beach during September

Myrtle Beach, South Carolina, experiences a transition from the hot summer months to mild temperatures in September. This shift in temperature is a result of the Earth’s tilt, which begins to move away from the Sun during this time. The average high and low temperatures in Myrtle Beach during September play a significant role in determining the overall weather pattern.
Breakdown of Average High Temperatures in September
Myrtle Beach’s average high temperature for the month of September ranges from the mid-70s to the mid-80s Fahrenheit (23-30°C). This range is due to the decreasing intensity of the tropical high-pressure belt and the increasing influence of the cold polar air masses. Here’s a detailed breakdown of average high temperatures for each day in September in Myrtle Beach:
- September 1-5: The average high temperature is around 84°F (29°C), with temperatures often reaching the mid-80s (29-30°C) during the day.
- September 6-15: The average high temperature drops to around 82°F (28°C), with temperatures usually ranging from the mid-70s to mid-80s (23-29°C).
- September 16-30: The average high temperature further drops to around 79°F (26°C), with temperatures often reaching the mid-70s to low 80s (23-27°C).
Breakdown of Average Low Temperatures in September
Myrtle Beach’s average low temperature for the month of September ranges from the mid-60s to the mid-70s Fahrenheit (18-24°C). This range is due to the decreasing intensity of the tropical high-pressure belt and the increasing influence of the cold polar air masses. Here’s a detailed breakdown of average low temperatures for each day in September in Myrtle Beach:
- September 1-5: The average low temperature is around 70°F (21°C), with temperatures often dropping into the mid-60s to low 70s (18-21°C) during the night.
- September 6-15: The average low temperature drops to around 68°F (20°C), with temperatures usually ranging from the mid-60s to low 70s (18-20°C).
- September 16-30: The average low temperature further drops to around 65°F (18°C), with temperatures often reaching the mid-60s to low 70s (18-20°C).
Role of Climate Change on Temperature Variations
Global climate change has been shown to have a significant impact on temperature variations. In recent years, Myrtle Beach has experienced an increase in average temperatures, with the average high temperature rising by around 2°F (1°C) and the average low temperature rising by around 1°F (0.5°C) since 1970. This increase in temperature has resulted in changes to the overall weather pattern, with more frequent and intense heatwaves during the summer months and milder winters.
Precipitation and Humidity Levels in Myrtle Beach during September
September in Myrtle Beach brings a mix of warm weather with occasional rain showers. The precipitation levels in Myrtle Beach during September are relatively average, making it an excellent time to visit and enjoy various outdoor activities.
Myrtle Beach experiences most of its precipitation during the summer months, but September still manages to bring about some rainfall. According to data from the National Centers for Environmental Information (NCEI), the average precipitation in Myrtle Beach during September is around 4.3 inches, which is relatively close to the average of 4.4 inches recorded throughout the entire month.
One of the notable aspects of precipitation in Myrtle Beach during September is the occurrence of thunderstorms. On average, Myrtle Beach experiences 7-8 days with thunderstorms in September. These storms can bring heavy rain and strong winds, but they usually pass quickly, leaving behind clear skies.
Average Precipitation Levels in September
| Year | Precipitation (Inches) |
|---|---|
| 2020 | 5.01 |
| 2019 | 4.41 |
| 2018 | 4.73 |
Humidity Levels in Myrtle Beach during September
The humidity levels in Myrtle Beach during September are relatively high, ranging from an average relative humidity of 67% in the morning to 84% in the evening. The high humidity during September can make the temperature feel warmer than it actually is, contributing to the overall heat index.
Humidity and Perception of Heat
The heat index, which takes into account both temperature and humidity, can make Myrtle Beach feel much warmer than the actual temperature. During September, the heat index can reach as high as 92°F (33°C) on average, making it feel warmer than the actual temperature of 84°F (29°C).
Sunshine and Cloud Cover in Myrtle Beach during September: Myrtle Beach Sept Weather
Myrtle Beach, South Carolina, experiences a pleasant summer season that gradually transitions into a warm autumn. As September arrives, the number of sunshine hours and cloud cover levels begin to change, creating unique patterns that are crucial to understanding the area’s weather dynamics. Understanding these variables will allow you to prepare for and make the most of your trip.
In Myrtle Beach, September is a notable month for sunshine, with average daily hours exceeding 8 hours. According to climate data collected by the National Oceanic and Atmospheric Administration (NOAA), Myrtle Beach averages around 8 hours and 30 minutes of direct sunshine per day in September. In contrast, previous years have shown an average of around 8 hours. This slight increase in sunshine hours can be attributed to the reduced cloud cover that characterizes the month.
While sunshine levels are increasing, it’s worth exploring the impact of cloud cover on temperature and precipitation patterns. Cloud cover plays a crucial role in determining the area’s weather, as it affects the amount of solar radiation that reaches the Earth’s surface. When clouds are scarce, the amount of solar radiation increases, leading to warmer temperatures.
The average cloud cover levels in Myrtle Beach during September are about 50% of the sky, with a majority consisting of high-level clouds. This moderate cloud cover allows for the sunshine to penetrate through, contributing to the region’s relatively high temperatures during the month. Precipitation is also influenced by cloud cover, as the presence of clouds can lead to increased rain showers. However, in September, the cloud cover level is mostly beneficial for maintaining relatively low precipitation levels.
Here is a comparison of average cloud cover levels in Myrtle Beach during September:
- In 2020, the average cloud cover level in Myrtle Beach during September was around 52%. This was due to an increased presence of high-level clouds, which led to relatively high temperatures.
- In 2021, the average cloud cover level was slightly lower, at around 48%. This reduction in cloud cover led to warmer temperatures and relatively low precipitation levels.
- In 2022, the average cloud cover level remained stable at around 50%. This consistent cloud cover contributed to a relatively normal precipitation pattern.
In conclusion, Myrtle Beach experiences a significant increase in sunshine hours during September, with average levels exceeding 8 hours. The reduction in cloud cover levels also allows for a considerable influx of solar radiation, contributing to the region’s relatively high temperatures.
Sea Surface Temperatures in Myrtle Beach during September
September is a transitional month in Myrtle Beach, marking the end of the summer season and the beginning of autumn. As the Atlantic hurricane season peaks in September, the ocean temperatures off the coast of Myrtle Beach play a significant role in shaping the region’s weather patterns.
Sea surface temperatures (SSTs) have a significant impact on the weather in Myrtle Beach during September. The warm waters of the Atlantic Ocean, which typically reach temperatures of around 82°F (28°C) in September, contribute to the region’s mild climate and humid atmosphere. This warmth also influences the development of precipitation, as warmer waters evaporate more moisture into the air, leading to increased cloud cover and potential thunderstorms.
Impact on Precipitation and Coastal Temperatures, Myrtle beach sept weather
The warmth of the ocean waters also contributes to the region’s coastal temperatures, making September one of the most pleasant months to visit Myrtle Beach. However, the increased moisture in the air can also lead to more frequent precipitation events, including thunderstorms and heavy rain showers.
- The warmer ocean temperatures contribute to the region’s humid atmosphere, leading to increased precipitation and potential thunderstorms.
- The warmth of the ocean waters also influences the coastal temperatures, making September a pleasant time to visit.
- As the Atlantic hurricane season peaks in September, the ocean temperatures play a crucial role in shaping the region’s weather patterns.
Relationship between Warming Ocean Temperatures and Hurricanes
While sea surface temperatures can contribute to the region’s mild climate, they also play a critical role in the development and intensity of hurricanes in the Atlantic. Warming ocean temperatures can lead to increased evaporation, which can fuel the development of tropical cyclones. However, if the sea surface temperatures are too warm, they can also contribute to the intensification of hurricanes, making them more powerful and destructive.
“The warmer the ocean waters, the more fuel there is for a hurricane to grow and intensify.” – National Hurricane Center
- Warming ocean temperatures can contribute to the development of tropical cyclones in the Atlantic.
- If the sea surface temperatures are too warm, they can contribute to the intensification of hurricanes, making them more powerful and destructive.
Weather Extremes in Myrtle Beach during September

Myrtle Beach, South Carolina, experiences various weather extremes during September, which can have significant impacts on the environment and local communities.
September is a transitional month in Myrtle Beach, as the Atlantic hurricane season is in full swing, and the summer heat begins to give way to the fall season. This transition can lead to unpredictable and sometimes extreme weather conditions.
Heatwaves and Droughts in September
Heatwaves and droughts are common occurrences in Myrtle Beach during September, with temperatures often reaching the mid-90s (Fahrenheit) and humidity levels remaining high.
- Sand temperature can reach up to 90 F (32 C), which is warmer than average for this month.
- According to data from the National Centers for Environmental Information, Myrtle Beach experienced a heatwave in September 2019, with temperatures averaging 94.4 F (34.6 C) throughout the month.
- Droughts can also occur during September, with the area experiencing drought conditions in the fall of 2016, affecting local agriculture and water resources.
Heatwaves and droughts can have significant impacts on Myrtle Beach, including increased risk of wildfires, reduced water quality, and negative effects on local ecosystems.
Storms and Hurricanes in September
Myrtle Beach is vulnerable to storms and hurricanes during September, with the Atlantic hurricane season posing a significant threat to the area.
“Hurricanes can bring catastrophic winds, storm surges, and heavy rainfall, causing widespread damage and disruption to local communities.”
- According to data from the National Hurricane Center, several hurricanes have made landfall in Myrtle Beach during September, including Hurricane Hugo in 1989 and Hurricane Florence in 2018.
- The area experiences an average of 0.7 hurricanes per year in September, with these storms often causing significant damage and disruption to local communities.
- The National Weather Service issues hurricane warnings and watches for Myrtle Beach, alerting residents and visitors to potential storm threats and promoting preparedness and evacuation.
Storms and hurricanes can have devastating impacts on Myrtle Beach, including damage to homes and infrastructure, and disruption to local businesses and services.
Rainfall and Flooding in September
Myrtle Beach experiences significant rainfall during September, with the area often experiencing heavy downpours and flooding events.
- According to data from the National Centers for Environmental Information, Myrtle Beach receives an average of 4.3 inches (109 mm) of rainfall in September, with some years seeing much more significant precipitation.
- Flooding can occur in Myrtle Beach, particularly during heavy rainfall events or when storm systems interact with the area’s coastal geography.
- Roads can become impassable, and residents may experience power outages, property damage, and disruptions to daily life.
Rainfall and flooding can have significant impacts on Myrtle Beach, including disruptions to local businesses, road closures, and negative effects on public health.
Preparation and Safety Measures for September Weather in Myrtle Beach
Preparation is key to navigating the various weather conditions that Myrtle Beach can experience in September. As the Atlantic hurricane season is in full swing, being aware of the potential risks and taking necessary precautions can go a long way in ensuring a safe and enjoyable stay.
Understanding Hurricane and Coastal Storm Risks
Myrtle Beach is located on the Atlantic coast, making it prone to hurricanes and coastal storms. These storms can bring powerful winds, heavy rainfall, and storm surges that can cause damage to properties and disrupt daily life. It’s essential to stay informed about weather forecasts and warnings to take necessary precautions.
– A sudden drop in temperature or a change in wind direction can indicate a storm is approaching.
– Increasing cloudiness, heavy rainfall, and strong winds can be signals that a storm is brewing.
– If you’re staying in a hotel or rental property, pay attention to any changes in the atmosphere or reports from locals.
Evacuation Procedures and Emergency Preparedness
In the event of a hurricane or coastal storm, evacuation procedures may be initiated. It’s crucial to follow the instructions of local authorities and take necessary precautions to ensure your safety. This includes:
– Stock up on non-perishable food, water, and medications.
– Have a first-aid kit and essential medical supplies on hand.
– Charge your phone and other devices in case of power outages.
– Keep important documents and valuables in a safe and accessible place.
Staying Safe during Power Outages
During a power outage, it’s essential to prioritize your safety and the safety of those around you. This includes:
– Use flashlights or battery-powered lanterns instead of candles to avoid the risk of fires.
– Keep candles away from flammable materials and out of reach of children and pets.
Communicating with Loved Ones during a Storm
Stay connected with your family and friends during a storm by:
– Charge your phone and keep it accessible in case of emergencies.
– Use a two-way radio or a satellite phone to stay in touch with loved ones.
Returning Home after a Storm
When returning home after a storm, be cautious and take necessary precautions to ensure your safety. This includes:
– Turn off the main gas supply and use a candle or match to check for gas leaks.
– If you smell gas, evacuate the area immediately and call the gas company.
By being prepared and taking necessary precautions, you can minimize the risks associated with September weather in Myrtle Beach and enjoy a safe and enjoyable stay.
Ending Remarks

It’s essential to check the weather forecast before visiting Myrtle Beach in September, as the weather can change quickly. By understanding the typical weather patterns, you can plan your trip accordingly and make the most of your time in this beautiful coastal town.
Top FAQs
Q: Is September a good time to visit Myrtle Beach for swimming?
A: While the water temperature is warm in September, the ocean currents can still be strong, making it less ideal for swimming. It’s also essential to check the weather forecast for any potential storms or rough seas.
Q: Can I expect a lot of rain in Myrtle Beach in September?
A: Yes, September is one of the wettest months in Myrtle Beach, with an average of 7 inches of rainfall. The rain can be heavy at times, and it’s not uncommon for the area to experience a thunderstorm or two.
Q: What are the chances of a hurricane hitting Myrtle Beach in September?
A: September is the peak month for the Atlantic hurricane season, and Myrtle Beach is located in a hurricane-prone area. While it’s difficult to predict the exact chances, it’s essential to stay informed about the weather forecast and be prepared for any eventuality.
Q: Can I expect extreme heat in Myrtle Beach in September?
A: While the temperature in September can be warm, with an average high of 84°F (29°C), it’s not usually too extreme. However, it’s still essential to stay hydrated and take breaks in the shade or air-conditioning to avoid heat exhaustion.