September Weather in Seabrook Island, United States

Last updated: June 24, 2025

In September, the average temperature in Seabrook Island, United States reaches a warm 26°C (79°F), making it an inviting destination. Expect minimums of 17°C (62°F) and maximums of 32°C (89°F), providing a pleasant range for outdoor activities. However, be prepared for some rain, as 170 mm (6.7 in) of precipitation can occur over 13 days, contributing to the average humidity of 83%. Enjoy the lush environment this climate fosters!

September Temperature in Seabrook Island

In September in Seabrook Island, the average temperature is a pleasant 26°C (79°F). The maximum can reach a warm 32°C (89°F), while the minimum can dip to a cooler 17°C (62°F). Overall, this climate makes Seabrook Island an ideal destination for travelers seeking enjoyable weather.

September Weather in Seabrook Island: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Seabrook Island, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Seabrook Island, September typically has an average temperature of 26°C (79°F), with highs reaching up to 32°C (89°F) and lows dropping to around 17°C (62°F).

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

September Precipitation in Seabrook Island

In Seabrook Island in September, the precipitation amount is 170 mm (6.7 in) over the course of 13 days.

September Precipitation Trends in Seabrook Island

The chart displays monthly precipitation patterns in Seabrook Island, 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 Seabrook Island, September typically receives around 170 mm (6.7 inches) of precipitation spread over approximately 13 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 Seabrook Island

In Seabrook Island 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 Seabrook Island

This chart illustrates the average monthly humidity levels in Seabrook Island, 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 Seabrook Island 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 Seabrook Island

In Seabrook Island 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 Seabrook Island.

Maximum UV Index Levels in Seabrook Island for September

The chart shows the monthly maximum UV Index (UVI) for Seabrook Island 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 Seabrook Island typically reaches 10, which falls under the very high exposure category.

Data source: Seabrook Island 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 Seabrook Island Compares to Other Months

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

This table compares monthly weather conditions in Seabrook Island, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (53°F)	66 mm (2.6 inches)	86%	moderate
February Weather	13°C (56°F)	87 mm (3.4 inches)	81%	high
March Weather	15°C (60°F)	72 mm (2.8 inches)	81%	very high
April Weather	19°C (66°F)	94 mm (3.7 inches)	79%	very high
May Weather	23°C (74°F)	81 mm (3.2 inches)	75%	extreme
June Weather	26°C (79°F)	117 mm (4.6 inches)	75%	extreme
July Weather	27°C (82°F)	162 mm (6.4 inches)	80%	extreme
August Weather	27°C (82°F)	200 mm (7.9 inches)	81%	extreme
September Weather	26°C (79°F)	170 mm (6.7 inches)	83%	very high
October Weather	23°C (74°F)	90 mm (3.5 inches)	78%	very high
November Weather	16°C (62°F)	97 mm (3.8 inches)	85%	high
December Weather	13°C (56°F)	145 mm (5.7 inches)	87%	moderate