September Weather in Bluffton, United States

Last updated: June 24, 2025

In September, the average temperature in Bluffton, United States is a pleasant 26°C (79°F). Expect a minimum of 16°C (61°F) and a maximum of 34°C (93°F), providing a comfortable range for outdoor activities. However, be prepared for some rain, as the area receives 127 mm (5.0 in) of precipitation over approximately 15 days. With an average humidity of 83%, it’s a great time to enjoy the lush landscapes that flourish in this climate!

September Temperature in Bluffton

In September in Bluffton, the average temperature is 26°C (79°F). The maximum can reach 34°C (93°F), while the minimum can be as low as 16°C (61°F). This pleasant climate makes Bluffton an ideal destination for travelers seeking warm weather and outdoor activities.

September Weather in Bluffton: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Bluffton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bluffton, September typically has an average temperature of 26°C (79°F), with highs reaching up to 34°C (93°F) and lows dropping to around 16°C (61°F).

Data source: Temperature data for Bluffton generated using information from the Copernicus Climate Change Service.

September Precipitation in Bluffton

In Bluffton in September, the total precipitation amount is 127 mm (5.0 in) distributed over 15 days.

September Precipitation Trends in Bluffton

The chart displays monthly precipitation patterns in Bluffton, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Bluffton, September typically receives around 127 mm (5.0 inches) of precipitation spread over approximately 15 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Bluffton

In Bluffton in September, humidity is 83%. With an average temperature of 26°C (79°F), this humidity feels like a heavy blanket enveloping you, making travel an exercise in endurance as the air clings to your skin and saps your energy.

September Average Humidity in Bluffton

This chart illustrates the average monthly humidity levels in Bluffton, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Bluffton is approximately 83%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bluffton

In Bluffton in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Bluffton.

Maximum UV Index Levels in Bluffton for September

The chart shows the monthly maximum UV Index (UVI) for Bluffton in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Bluffton typically reaches 10, which falls under the very high exposure category.

Data source: Bluffton September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in Bluffton Compares to Other Months

Weather in Bluffton varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Bluffton, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Bluffton, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (53°F)	61 mm (2.4 inches)	86%	moderate
February Weather	14°C (57°F)	80 mm (3.1 inches)	81%	high
March Weather	16°C (61°F)	68 mm (2.7 inches)	81%	very high
April Weather	19°C (67°F)	85 mm (3.4 inches)	79%	very high
May Weather	23°C (74°F)	89 mm (3.5 inches)	75%	extreme
June Weather	26°C (79°F)	122 mm (4.8 inches)	75%	extreme
July Weather	28°C (82°F)	156 mm (6.1 inches)	80%	extreme
August Weather	27°C (82°F)	180 mm (7.1 inches)	81%	extreme
September Weather	26°C (79°F)	127 mm (5.0 inches)	83%	very high
October Weather	23°C (73°F)	88 mm (3.5 inches)	78%	very high
November Weather	16°C (61°F)	90 mm (3.5 inches)	85%	high
December Weather	13°C (55°F)	125 mm (4.9 inches)	87%	moderate