Last updated: February 24, 2025
In September, Hilton Head experiences a vibrant transition into autumn, with maximum temperatures reaching a sizzling 34°C (93°F) and an average of 26°C (79°F). As the days warm up, evenings cool down to a comfortable minimum of 16°C (61°F). However, expect a moist atmosphere, characterized by a high humidity level of 83%, creating a subtropical feel. Rainfall is quite prevalent, with 127 mm (5.0 in) of precipitation over approximately 15 days, ensuring lush landscapes and vibrant flora. September is a month of warmth and moisture, perfect for those looking to enjoy the rich natural beauty of Hilton Head.
As September arrives in Hilton Head, the warmth of summer lingers, creating an inviting atmosphere for visitors. With minimum temperatures settling around 16°C (61°F) and average highs reaching up to 34°C (93°F), the month offers a delightful transition into the cooler fall days ahead. This feisty blend of warm days and cooler nights makes it an ideal time for outdoor activities, whether it's basking on the beach or exploring the scenic landscapes. Compared to the peak of summer, September marks a subtle shift: while average temperatures dip slightly, the island remains vibrant and alive, making it a perfect escape for those seeking both relaxation and adventure. As the month progresses, the lingering warmth still hints at the last gasps of summer, inviting you to enjoy all that Hilton Head has to offer.
In Hilton Head, September marks a notable shift in the precipitation pattern, with 127 mm (5.0 in) of rainfall spread across 15 days. This level of precipitation is a dip compared to the heavy rains of August, which saw 180 mm (7.1 in) over 22 days. However, September still remains quite wet, continuing the trend of summer humidity that dominates the region. As the month transitions into fall, the number of rainy days decreases from the peak seen in July and August, yet it still sustains a significant amount of rainfall that nourishes the lush landscape of Hilton Head. This month acts as a bridge between the intense summer showers and the more moderate conditions typically seen in October and November, making it a quintessential period for observing the changing seasons in this coastal paradise.
In September, Hilton Head experiences a slight uptick in humidity, reaching 83%, following the warmer summer months. This value reflects a trend of increasing humidity from the drier spring months, peaking in the late summer. As the year progresses, humidity levels gradually decline from a high of 87% in December to the crisp air of winter. Notably, September's humidity is just a notch above the comfortable levels seen in May and June, making it a transition month as the region begins to shift towards the cooler fall weather. Overall, Hilton Head's September ambiance is marked by a comfortably humid climate, perfect for indulging in its beautiful coastal attractions before the advent of autumn.
As summer transitions into fall in Hilton Head, September brings a very high UV Index of 10, indicating that sun safety remains a priority for outdoor activities. While the index slightly drops from the extreme levels seen during the height of summer, the burn time remains relatively brief at just 15 minutes. This trend illustrates a continued need for protective measures against the sun’s rays, especially for those spending extended periods outdoors. Following September, the UV Index gradually declines into October with a rating of 8, but it is crucial to maintain vigilance as the autumn sun can still pose risks. Whether you’re enjoying the beach or exploring the island, staying informed about the UV Index is key to ensuring a safe and enjoyable time in the sun. For detailed UV insights, visit Hilton Head UV Index.
UV Risk Categories
As September unfolds in Hilton Head, 304 hours of sunshine illuminate the coastal paradise, making it a delightful month for outdoor activities. Following the sun-drenched heights of July and August, which boast 347 and 318 hours respectively, September still holds onto the warmth, providing a gentle transition from summer to autumn. The trend shows a gradual decline in sunlight hours as the year progresses, with the peak at July and a steady descent leading into the cooler October months. September's abundant sunshine invites both residents and visitors to bask in the lingering warmth, enjoy beach outings, and savor the picturesque sunsets of this beautiful season.
As summer wanes, September in Hilton Head, United States, emerges as a promising month for sunshine, boasting a 51% chance of clear skies. This marks a notable uptick from the dreary days of June and July, which see only 27% likelihood of sunny weather. Following the vibrant months of April and May, which hover around 55% and 53% respectively, September strikes a balance, presenting a delightful opportunity for outdoor activities. As the month transitions into fall, residents and visitors alike can revel in the pleasantly warm weather, making it an ideal time to explore the beautiful landscapes of this coastal paradise before autumn settles in.
September in Hilton Head heralds a subtle shift as daylight begins to wane, offering approximately 12 hours of sunlight. Following the height of summer with a maximum of 14 hours in June, daylight gradually diminishes through the autumn months. This transition reflects a broader trend of shortening days that starts in late summer, with August also basking in 13 hours of light. As September unfolds, locals and visitors can relish the warm, sunlit days before the shorter hours of October roll in. This month strikes a harmonious balance, providing enough daylight for beach strolls and outdoor adventures while hinting at the cozy evenings that await as fall approaches.
As summer fades into fall, September in Hilton Head brings a gentle shift in the breeze, characterized by its average wind speed of 3.2 m/s (7 mph)—the softest gusts of the year. Following a season where winds calmed in July and August, the September air is serene, inviting beachcombers and nature lovers to savor the transition. Compared to the earlier months, where winds hovered around 4.3 to 4.4 m/s, this lull creates a more tranquil experience, perfect for leisurely strolls along the shore. As we move from September into October, one can expect a slight uptick in wind, hinting at the dynamic shifts that autumn will bring.
The weather in Hilton Head changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Hilton Head and find detailed weather information for every month.
September and January present starkly contrasting weather conditions. September boasts warmer temperatures, with a minimum of 16°C (61°F) and an average high of 34°C (93°F), leading to a humid atmosphere with 83% humidity and significant precipitation at 127 mm (5.0 in) over 15 days. In contrast, January experiences much cooler temperatures, dipping as low as -5°C (23°F) with an average of 11°C (53°F) and a maximum of 24°C (75°F). The winter month sees significantly less rainfall at 61 mm (2.4 in) over just 7 days, though humidity remains relatively high at 86%. For a deeper look into January weather specifics, you can visit Hilton Head weather in January.
September and February exhibit strikingly different weather patterns. In September, temperatures are typically much warmer, with a minimum of 16°C (61°F) and averaging around 26°C (79°F), peaking at a high of 34°C (93°F). This month also sees considerable precipitation, with 127 mm (5.0 in) spread over about 15 days and a high humidity level of 83%. In contrast, February experiences cooler temperatures, ranging from a minimum of 1°C (33°F) to an average of 14°C (57°F), with a maximum of 25°C (77°F). Precipitation is lower at 80 mm (3.1 in) across 11 days, accompanied by a slightly lower humidity of 81%. For a deeper insight into February weather specifics, you can visit Hilton Head weather in February.
When comparing the weather of September and March, notable differences emerge. September typically enjoys warmer temperatures, with a minimum of 16°C (61°F) and an average of 26°C (79°F), peaking at a high of 34°C (93°F). In contrast, March experiences much cooler conditions, starting with a minimum of 1°C (34°F) and averaging 16°C (61°F), ultimately reaching a maximum of 27°C (81°F). Precipitation is also a significant factor; September sees 127 mm (5.0 in) of rainfall over 15 days, while March is drier, with only 68 mm (2.7 in) over 6 days. Interestingly, humidity remains fairly consistent in both months, with September at 83% and March slightly lower at 81%. For more detailed information, check the Hilton Head weather in March.
When comparing the weather in September and April, there are notable differences in temperature and precipitation. September boasts warmer temperatures, with a minimum of 16°C (61°F) and an average of 26°C (79°F), reaching a maximum of 34°C (93°F). In contrast, April features cooler conditions, with temperatures ranging from a minimum of 6°C (43°F) to an average of 19°C (67°F) and a maximum of 30°C (87°F). Additionally, September experiences more rainfall, totaling 127 mm (5.0 in) over 15 days, compared to April's 85 mm (3.4 in) over just 8 days. Humidity levels are relatively high in both months, but September holds a slight edge at 83%, while April's humidity is at 79%. For those interested in specifics, you can find more details about the climate here: Hilton Head weather in April.
When comparing the weather in September and May, we notice distinct differences in temperature and humidity. September typically has a higher average temperature of 26°C (79°F) compared to May's 23°C (74°F), although both months can reach similar maximum temperatures of around 34°C (93°F to 94°F). September also experiences higher humidity at 83%, making it feel warmer, while May's humidity is more comfortable at 75%. Additionally, September sees more precipitation, with 127 mm (5.0 in) over an average of 15 days, compared to May's 89 mm (3.5 in) spread over about 10 days. For a detailed look at May’s weather, you can check Hilton Head weather in May.
In comparing the weather of September and June, both months experience similar average temperatures, with highs reaching up to 34°C (93°F), but September tends to feature slightly cooler minimum temperatures, averaging 16°C (61°F) compared to June's 18°C (64°F). Precipitation levels are relatively close, with September receiving 127 mm (5.0 in) over 15 days, while June has 122 mm (4.8 in) spread across 18 days. However, September is characterized by higher humidity at 83%, compared to June's more comfortable 75%. This makes September feel warmer despite the same average temperature. For a detailed view of June's weather specifics, check out Hilton Head weather in June.
When comparing the weather in September and July, September tends to be slightly cooler and more humid. In September, temperatures range from a minimum of 16°C (61°F) to a maximum of 34°C (93°F), with an average of 26°C (79°F). July, on the other hand, sees higher temperatures with a minimum of 23°C (73°F) and a maximum of 35°C (95°F), averaging at 28°C (82°F). Precipitation is also more prevalent in September, with 127 mm (5.0 in) over 15 days, compared to July's 156 mm (6.1 in) across 19 days. The humidity levels are comparable, with September at 83% and July at 80%. For more detailed insights into July weather, you can check out Hilton Head weather in July.
In comparing the weather patterns of September and August, September generally offers cooler temperatures, with a minimum of 16°C (61°F) and an average of 26°C (79°F), whereas August is notably warmer, with a minimum of 22°C (73°F) and an average of 27°C (82°F). Both months experience maximum temperatures peaking at around 34°C (93°F in September and 94°F in August). However, September receives significantly more rainfall, totaling 127 mm (5.0 in) over 15 days, compared to August's 180 mm (7.1 in) across 22 days. Humidity levels are slightly higher in September at 83%, compared to 81% in August, contributing to a more muggy feel despite the cooler average temperatures. For more specific insights on August weather, you can check Hilton Head weather in August.
September and October showcase a notable transition in weather patterns. September typically enjoys warmer temperatures, with averages around 26°C (79°F) and maximums reaching up to 34°C (93°F), coupled with high humidity levels of 83%. In contrast, October sees cooler temperatures, with average highs of 23°C (73°F) and minimums dropping to 6°C (42°F). This month also experiences less precipitation, totaling 88 mm (3.5 in) over about 11 days, compared to September's 127 mm (5.0 in) over 15 days. For more details on the October weather, you can check out Hilton Head weather in October.
September typically showcases warmer weather compared to November, with temperatures ranging from a minimum of 16°C (61°F) to a maximum of 34°C (93°F), and an average temperature of 26°C (79°F). This month also experiences significant rainfall, with 127 mm (5.0 in) falling over 15 days and humidity levels at a high 83%. In contrast, November brings a noticeable chill, with minimum temperatures dropping to 1°C (35°F) and a more moderate average of 16°C (61°F). While the maximum temperature reaches 28°C (82°F), the month sees less precipitation, totaling 90 mm (3.5 in) over only 8 days, and a slightly higher humidity of 85%. For more details on the unique weather patterns of November, you can visit Hilton Head weather in November.
In September, the weather is notably warmer, with temperatures ranging from a minimum of 16°C (61°F) to a maximum of 34°C (93°F) and an average of 26°C (79°F). This month experiences significant rainfall, with about 127 mm (5.0 in) over approximately 15 days, and the humidity is relatively high at 83%. In contrast, December presents a much cooler climate, with temperatures dropping to a minimum of -1°C (30°F) and an average of 13°C (55°F), peaking at 23°C (73°F). Precipitation remains similar, at 125 mm (4.9 in), but occurs over fewer days (10), and the humidity slightly increases to 87%. For more detailed information, you can check Hilton Head weather in December.
As September unfolds in Hilton Head, the weather offers a unique blend of warmth and humidity, marking a transition from the scorching summer months. With an average temperature hovering around a pleasant 26°C (79°F), it provides a comfortable escape for visitors. However, be prepared for occasional rain as the area experiences about 15 rainy days this month, contributing to a higher humidity level of 83%. This combination creates a tropical atmosphere, contrasting sharply with the drier conditions of the preceding summer months. For a deeper understanding of what to expect year-round, explore the Hilton Head Climate resource.