September weather forecast
South Carolina, USA

September in South Carolina is a month of metamorphosis, as the intense heat of summer starts to wane and the initial whispers of autumn become evident. Coastal locales, such as Charleston, experience temperatures that fluctuate from 65°F (18.3°C) to 84°F (28.9°C). Days remain warm, but there's a notable crispness in the air, especially during the early mornings and late evenings.

In the Midlands, cities like Columbia witness a significant reduction in the heat that dominated the previous months. While afternoons can still be quite warm, the intensity of the summer sun diminishes. The Upstate, influenced by the Blue Ridge Mountains, begins to showcase some early signs of fall, especially in regions of higher elevation where foliage starts to change its hue.

September's declining temperatures are paired with diminishing humidity, making the outdoors more inviting. Occasional rain showers might punctuate the month, but they tend to be less intense and less frequent than the summer storms. The skies often exhibit a deep blue hue, emblematic of the clear, drier air.

When contrasted with August, September's cooler and less humid environment is evident. The transition from the stifling summer months to the milder autumn ones is welcomed by many. As September draws to a close, South Carolina gears up for the full splendor of fall, with October promising a display of vibrant colors and even cooler temperatures.

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• Columbia - September »
  The month with the least rainfall in Columbia, South Carolina, is September, when the rain falls for 11 days and typically collects 1.46" (37mm) of precipitation. In Columbia during September, the rain falls for 11 days and regularly aggregates up to 1.46" (37mm) of precipitation.
• Charleston - September »
  In Charleston the average seawater temperature in September is 81.7°F (27.6°C). The average relative humidity in September in Charleston, South Carolina, is 75%.
• North Charleston - September »
  On the first day of September in North Charleston, South Carolina, sunrise is at 6:54 am and sunset at 7:45 pm. In North Charleston in September, during 14.8 rainfall days, 2.76" (70mm) of precipitation is typically accumulated.
• Mount Pleasant - September »
  In Mount Pleasant, in September, during 19.4 rainfall days, 5.47" (139mm) of precipitation is typically accumulated. On the last day of September, in Mount Pleasant, sunrise is at 7:12 am and sunset at 7:05 pm EDT.
• Rock Hill - September »
  The month with the least rainfall in Rock Hill is September, when the rain falls for 11.2 days and typically collects 1.97" (50mm) of precipitation. In Rock Hill in September, it is raining for 11.2 days, with typically 1.97" (50mm) of accumulated precipitation.
• Greenville - September »
  On the first day of September in Greenville sunrise is at 7:02 am and sunset at 7:56 pm. The arrival of September in Greenville corresponds with a light shift in temperature, down from a tropical 88.5°F (31.4°C) in August to a moderately hot 82.6°F (28.1°C).
• Summerville - September »
  On the first day of September in Summerville sunrise is at 6:55 am and sunset at 7:46 pm. September in Summerville observes an average high-temperature of a warm 85.5°F (29.7°C), marking an insignificant difference from August's 90.1°F (32.3°C).
• Goose Creek - September »
  September in Goose Creek marks the beginning of fall as the summer heat starts to recede. In September, in Goose Creek the rain falls for 16.5 days.
• Sumter - September »
  As Sumter moves from September into October anticipate a further decline in temperature, an upsurge in wind speeds, and shorter daylight hours, setting the perfect stage for the full onset of autumn. In Sumter during September, the rain falls for 14.1 days and regularly aggregates up to 2.48" (63mm) of precipitation.
• Hilton Head Island - September »
  In September, the average ocean temperature in Hilton Head Island is 81.7°F (27.6°C). In Hilton Head Island the average relative humidity in September is 75%.
• Florence - September »
  In Florence, in September, during 14.5 rainfall days, 2.95" (75mm) of precipitation is typically accumulated. On the first day of September in Florence, sunrise is at 6:52 am and sunset at 7:45 pm.
• Spartanburg - September »
  In Spartanburg during September, the rain falls for 11.6 days and regularly aggregates up to 1.54" (39mm) of precipitation. The shift from August to September in Spartanburg, South Carolina, includes a small decrease in the average high-temperature, from a hot 89.4°F (31.9°C) to a warm 83.8°F (28.8°C).