September Weather in Bluffton, United States

Last updated: June 24, 2025

In September, the average temperature in Bluffton, United States hovers around 20°C (68°F), with a minimum dipping to 4°C (40°F) and a maximum soaring to 33°C (93°F). This month typically sees about 70 mm (2.8 in) of precipitation over 9 days, contributing to an average humidity level of 78%. Perfect conditions for exploring the beauty of the region!

September Temperature in Bluffton

In September in Bluffton, the average temperature is 20°C (68°F). Maximum can reach 33°C (93°F) and minimum can be as low as 4°C (40°F). This variety in temperatures makes it a great time for travelers to enjoy a mix of warm sunny days and cooler evenings, so be sure to pack accordingly!

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 20°C (68°F), with highs reaching up to 33°C (93°F) and lows dropping to around 4°C (40°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 70 mm (2.8 in) spread over 9 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 70 mm (2.8 inches) of precipitation spread over approximately 9 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 78%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket that makes exploring the sights a bit sticky, so travelers should stay hydrated and take frequent breaks in the shade.

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 78%, 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 is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, 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	-2°C (29°F)	73 mm (2.9 inches)	88%	moderate
February Weather	0°C (32°F)	83 mm (3.3 inches)	87%	moderate
March Weather	5°C (41°F)	95 mm (3.8 inches)	87%	high
April Weather	10°C (50°F)	99 mm (3.9 inches)	87%	very high
May Weather	17°C (63°F)	134 mm (5.3 inches)	81%	very high
June Weather	22°C (72°F)	122 mm (4.8 inches)	82%	very high
July Weather	24°C (76°F)	110 mm (4.3 inches)	81%	very high
August Weather	23°C (73°F)	88 mm (3.4 inches)	78%	very high
September Weather	20°C (68°F)	70 mm (2.8 inches)	78%	very high
October Weather	14°C (57°F)	91 mm (3.6 inches)	82%	high
November Weather	5°C (42°F)	85 mm (3.3 inches)	89%	moderate
December Weather	2°C (35°F)	62 mm (2.5 inches)	86%	low