September Weather in North Charleston, United States

Last updated: June 24, 2025

In North Charleston, United States, the average temperature in September is a pleasant 26°C (78°F). Temperatures vary between a cool 14°C (57°F) and a warm 35°C (94°F). Expect around 176 mm (6.9 in) of precipitation spread over 14 days, contributing to a high average humidity of 83%. Enjoy the vibrant atmosphere this season brings!

September Temperature in North Charleston

In September in North Charleston, the average temperature is 26°C (78°F). Maximum temperatures can reach 35°C (94°F), while minimums can drop as low as 14°C (57°F). This pleasant climate makes North Charleston an ideal destination for travelers seeking warm weather.

September Weather in North Charleston: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in North Charleston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In North Charleston, September typically has an average temperature of 26°C (78°F), with highs reaching up to 35°C (94°F) and lows dropping to around 14°C (57°F).

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

September Precipitation in North Charleston

In North Charleston in September, the precipitation amount is 176 mm (6.9 in) over a period of 14 days.

September Precipitation Trends in North Charleston

The chart displays monthly precipitation patterns in North Charleston, 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 North Charleston, September typically receives around 176 mm (6.9 inches) of precipitation spread over approximately 14 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 North Charleston

In North Charleston in September, humidity is 83%. With an average temperature of 26°C (78°F), this humidity feels like a heavy blanket wrapping around you, making travel a sticky affair as sweat lingers on your skin and every step requires extra effort.

September Average Humidity in North Charleston

This chart illustrates the average monthly humidity levels in North Charleston, 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 North Charleston 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 North Charleston

In North Charleston in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in North Charleston.

Maximum UV Index Levels in North Charleston for September

The chart shows the monthly maximum UV Index (UVI) for North Charleston 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 North Charleston typically reaches 9, which falls under the very high exposure category.

Data source: North Charleston 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 North Charleston Compares to Other Months

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

This table compares monthly weather conditions in North Charleston, 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 (52°F)	59 mm (2.3 inches)	86%	moderate
February Weather	14°C (57°F)	78 mm (3.1 inches)	81%	high
March Weather	15°C (60°F)	60 mm (2.4 inches)	81%	very high
April Weather	19°C (66°F)	101 mm (4.0 inches)	79%	very high
May Weather	23°C (74°F)	87 mm (3.4 inches)	75%	extreme
June Weather	26°C (79°F)	150 mm (5.9 inches)	75%	extreme
July Weather	28°C (82°F)	187 mm (7.4 inches)	80%	extreme
August Weather	27°C (81°F)	183 mm (7.2 inches)	81%	extreme
September Weather	26°C (78°F)	176 mm (6.9 inches)	83%	very high
October Weather	22°C (72°F)	79 mm (3.1 inches)	78%	very high
November Weather	15°C (59°F)	92 mm (3.6 inches)	85%	high
December Weather	12°C (54°F)	127 mm (5.0 inches)	87%	moderate