Last updated: February 24, 2025
Experience the delightful September climate of Kiawah Island, United States, where temperatures range from a pleasant 17°C (63°F) to a maximum of 31°C (88°F), averaging around 26°C (79°F). This month brings an average humidity of 83%, contributing to a warm and tropical ambiance. However, be prepared for rain as the island receives approximately 191 mm (7.5 in) of precipitation over 13 days. Whether you're soaking up the sun or strolling along the beach, September in Kiawah Island offers a truly inviting atmosphere for outdoor enthusiasts and nature lovers alike.
In September, Kiawah Island experiences a delightful transition as summer gradually yields to autumn. With minimum temperatures around 17°C (63°F), the island remains comfortably warm, while the average climbs to a pleasant 26°C (79°F). Daily highs reach an inviting 31°C (88°F), making it one of the warmest months of the year. This trend of warmth extends from August, where temperatures are similarly high, ensuring that beachgoers still find ample opportunities to soak up the sun. As the month progresses, however, the cooling evenings hint at the upcoming changes of fall, providing a perfect balance for visitors seeking the last warm days of the season.
As summer transitions into fall, September in Kiawah Island showcases a notable shift in precipitation patterns. With 191 mm (7.5 in) of rainfall across 13 days, this month marks a peak in moisture received, falling just short of the record set in August. Despite the slight decrease from August's 209 mm, September maintains a significant level of rainfall, indicating the tail end of the wet season. The increase from the beginnings of the year highlights the island's susceptibility to late-summer storms, contributing to an overall wetter climate during these months. This transitional period not only enriches the lush landscape but also sets the stage for the drier conditions that characterize the upcoming fall.
As summer transitions into fall, September on Kiawah Island sees a modest dip in humidity levels, settling at 83%. This marks a slight increase from the drier summer months of June and May, both at 75%, and reflects the lingering warmth and moisture characteristic of late summer. Throughout the year, humidity tends to peak in the winter months, reaching 86% in January and 87% in December, while maintaining a consistent range between the low 75% in late spring and up to the high 80s during the hotter summer months. This trend underscores the island's humid subtropical climate, creating an inviting atmosphere for those looking to enjoy the natural beauty of Kiawah Island.
In September, Kiawah Island experiences a UV Index of 10, categorizing it as having a very high exposure level. This indicates a slight decrease from the extreme levels seen during the peak summer months of June through August, where the UV Index remained consistently at 11. As the days transition into autumn, the burn time extends to 15 minutes, reminding visitors that while the intensity is lower, sun protection is still crucial. This trend of high UV exposure in the summer months illustrates the need for vigilance in sun safety throughout the year. For more detailed insights on UV levels, check out Kiawah Island UV Index.
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As summer gently transitions into fall, September in Kiawah Island boasts a delightful 303 hours of sunshine, continuing the trend of robust sunlight. This vibrant month stands as a bridge between the sun-drenched days of summer, peaking at 344 hours in July, and the gradual decline into the cooler months ahead. While June and July showcase the pinnacle of summer radiance, September's ample sunshine signals the perfect time for outdoor activities amidst the stunning backdrop of autumn's approach. With each passing month, the hours of sunlight reflect a rhythmic dance of the seasons, creating an inviting atmosphere for both relaxation and adventure.
As September rolls in on Kiawah Island, the likelihood of sunny weather dances around 52%, offering a delightful reprieve after the summer's heavier cloud cover. This marks a notable improvement from the months of June and July, where the chances dipped to as low as 29% and 35%, respectively. The summer trend of cloudy days gives way to a more promising forecast, positioning September as a great time to soak up the sun. Following the summer months, the probability of sunny days aligns closely with October's 51%, suggesting that the sunny season lingers just a bit longer before the cooler months set in. Overall, September emerges as a perfect transitional month, balancing warmth and sunlight for both visitors and residents alike.
As summer transitions into autumn, September in Kiawah Island, United States, reveals a gentle shift in daylight hours, offering approximately 12 hours of daylight. This gradual decline from the peak of 14 hours experienced in June and July reflects the changing seasons, as sunlight slowly retreats. Following a vibrant summer, where outdoor activities thrived under the sun, September marks a delightful balance, providing still ample light for exploration while hinting at the cozy, shorter days ahead in October. The trend of decreasing daylight continues through the fall, yet each hour of sunlight remains precious on the picturesque shores of Kiawah Island, inviting both relaxation and adventure during this transitional month.
As summer transitions into fall, September in Kiawah Island greets visitors with its gentle breezes, marked by an average wind speed of 4.6 m/s (10 mph). This slight dip in wind intensity from the preceding months reflects a broader trend, as the peak summer winds gradually diminish. Notably, July and August recorded the year's lowest averages, emphasizing the calming effect of late summer. The steady decline through these months sets the stage for the more invigorating winds of autumn, with October showing a slight uptick to 5.0 m/s (11 mph). This transition not only brings a refreshing change to the island's atmosphere but also highlights the serene beauty of Kiawah Island, making it an ideal time for outdoor adventures amidst the mellow winds.
The weather in Kiawah Island 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 Kiawah Island and find detailed weather information for every month.
In September, the weather is warm and humid, with average temperatures reaching 26°C (79°F) and maximums peaking at 31°C (88°F). This month experiences significant rainfall, totaling 191 mm (7.5 in) across 13 days, contributing to a high humidity level of 83%. In contrast, January brings a much cooler climate, with average temperatures around 12°C (54°F) and maximums only reaching 20°C (69°F). Precipitation in January is considerably lower at 58 mm (2.3 in) over just 7 days, and the humidity remains relatively high at 86%. For more details about January weather, check out Kiawah Island weather in January.
In comparing the weather between September and February, there’s a notable contrast in temperatures and precipitation patterns. September tends to be much warmer, with average temperatures ranging from 17°C (63°F) to 31°C (88°F) and high humidity at 83%. In contrast, February experiences cooler temperatures, with averages between 3°C (38°F) and 20°C (69°F), and a slightly lower humidity level of 81%. Additionally, September is wetter, receiving 191 mm (7.5 in) of precipitation over 13 days, while February sees a more moderate 81 mm (3.2 in) over just 10 days. For more detailed insights, you can check out the Kiawah Island weather in February.
In comparing the weather between September and March, a notable contrast emerges. September typically boasts warmer temperatures, ranging from a minimum of 17°C (63°F) to a maximum of 31°C (88°F), with an average of 26°C (79°F). This month also sees higher precipitation levels, with 191 mm (7.5 in) falling over roughly 13 days, resulting in a humidity of 83%. In contrast, March presents a much cooler climate, where the temperatures dip to a minimum of 3°C (38°F) and peak at 22°C (71°F), averaging 15°C (60°F). Furthermore, March experiences significantly less precipitation, totaling 64 mm (2.5 in) over about 6 days, with humidity slightly lower at 81%. For more details on March weather, you can explore Kiawah Island weather in March.
September and April present contrasting weather patterns. September boasts higher temperatures, with a minimum of 17°C (63°F) and an average of 26°C (79°F), peaking at 31°C (88°F). In contrast, April features a milder temperature range, starting at a minimum of 6°C (44°F) and averaging 19°C (66°F) with a maximum of 26°C (79°F). While September experiences more rainfall, with 191 mm (7.5 in) over 13 days, April is comparatively drier, receiving 91 mm (3.6 in) across just 7 days. Interestingly, although September has a slightly higher humidity level at 83%, April remains comfortable at 79%. For more details on April weather, check out Kiawah Island weather in April.
In comparing the weather of September and May, September tends to be warmer with average temperatures around 26°C (79°F) and maximums reaching up to 31°C (88°F), whereas May sees cooler averages of 23°C (74°F) and maximums of 29°C (85°F). September also experiences higher humidity levels at 83% compared to May's 75%. Additionally, September has significantly more precipitation, averaging 191 mm (7.5 in) over 13 rainy days, in contrast to May's 75 mm (2.9 in) spread across just 7 days. For more detailed information, you can check out Kiawah Island weather in May.
When comparing the weather in September to that of June, both months share a similar average temperature of 26°C (79°F), though September tends to be slightly warmer with a maximum of 31°C (88°F) compared to June's 30°C (86°F). However, September is marked by higher humidity at 83% versus June's 75%, contributing to a more muggy feel. Additionally, September experiences significantly more precipitation, totaling 191 mm (7.5 in) over 13 rainy days, while June sees less rainfall with 111 mm (4.4 in) over 16 days. For a more detailed look, you can check Kiawah Island weather in June.
In comparing the weather of September and July, September tends to be slightly cooler with an average temperature of 26°C (79°F) compared to July's average of 27°C (82°F). While July has a higher minimum temperature of 23°C (74°F), September brings a bit more warmth with a maximum temperature reaching up to 31°C (88°F). Additionally, September experiences more precipitation, totaling 191 mm (7.5 in) over 13 days, whereas July has 159 mm (6.2 in) spread across 16 days. Humidity levels are relatively similar, with September at 83% and July at 80%. For a more detailed look at July's weather, you can check out Kiawah Island weather in July.
September generally sees slightly cooler temperatures compared to August, with minimums dropping from 23°C (74°F) to 17°C (63°F) and average temperatures falling from 27°C (82°F) to 26°C (79°F). While both months experience high humidity, September is marginally higher at 83% compared to August's 81%. Precipitation is also reduced in September, with 191 mm (7.5 in) over 13 days, compared to August's 209 mm (8.2 in) over 20 days. For a more detailed look at August weather, check out Kiawah Island weather in August.
In comparing the weather between September and October, September tends to be warmer and more humid, with daily temperatures ranging from a minimum of 17°C (63°F) to a maximum of 31°C (88°F) and an average of 26°C (79°F). It also experiences higher precipitation, totaling 191 mm (7.5 in) over 13 days. In contrast, October sees a notable drop in temperatures, with minimums dipping to 9°C (48°F) and an average of 23°C (74°F), while maximums reach 29°C (85°F). Additionally, October is significantly drier, with only 85 mm (3.4 in) of rainfall over 10 days and slightly lower humidity at 78%. For more detailed information on October weather, check out Kiawah Island weather in October.
In September, temperatures are generally warmer, with a minimum of 17°C (63°F) and an average high reaching 31°C (88°F). The month experiences significant rainfall, with 191 mm (7.5 in) of precipitation spread over 13 days, contributing to a relatively high humidity level of 83%. In contrast, November sees much cooler temperatures, with lows dipping down to 4°C (39°F) and an average high of 26°C (78°F). Precipitation decreases to 103 mm (4.1 in) over only 8 days, and humidity remains slightly elevated at 85%. For more insights on November conditions, check out Kiawah Island weather in November.
September and December present contrasting weather patterns. In September, temperatures are considerably warmer, ranging from a minimum of 17°C (63°F) to a maximum of 31°C (88°F), with an average of 26°C (79°F). This month is characterized by high humidity levels at 83% and significant rainfall, totaling 191 mm (7.5 in) over 13 days. In contrast, December experiences much cooler temperatures, where the minimum drops to 1°C (34°F) and the average sits at 14°C (57°F), peaking at 22°C (72°F). Despite being drier, with only 137 mm (5.4 in) of precipitation over 9 days, the humidity remains relatively high at 87%. For more detailed information about December weather, visit Kiawah Island weather in December.
As September rolls in, Kiawah Island showcases a delightful transition in weather. With average temperatures around a cozy 26°C (79°F), it offers a refreshing reprieve from the summer heat, although daytime highs can still reach a warm 31°C (88°F). The increased humidity at 83% adds a tropical feel to the air, making it perfect for serene beach strolls just before the autumn kick-off. However, be prepared for some rainy spells, as September typically sees a higher precipitation of 191 mm over about 13 days, adding a touch of moisture that makes the island's lush landscapes even more vibrant. For a deeper dive into what makes Kiawah Island's weather special, check out the Kiawah Island Climate.