October Weather in Charleston, United States

Last updated: June 24, 2025

In October, the average temperature in Charleston, United States hovers around 10°C (50°F). Expect a range from a chilly -5°C (24°F) to a warm 25°C (78°F). During this month, the region typically sees 126 mm (5.0 in) of precipitation over 11 days, resulting in a comfortable average humidity of 82%.

October Temperature in Charleston

In October in Charleston, the average temperature is 10°C (50°F), with maximums reaching up to 25°C (78°F) and minimums dropping as low as -5°C (24°F). This variability in temperature makes Charleston an intriguing destination for travelers who enjoy diverse weather conditions.

October Weather in Charleston: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Charleston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Charleston, October typically has an average temperature of 10°C (50°F), with highs reaching up to 25°C (78°F) and lows dropping to around -5°C (24°F).

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

October Precipitation in Charleston

In Charleston in October, the total precipitation amount is 126 mm (5.0 in) spread over 11 days.

October Precipitation Trends in Charleston

The chart displays monthly precipitation patterns in Charleston, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Charleston, October typically receives around 126 mm (5.0 inches) of precipitation spread over approximately 11 days.

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

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Millimeters (mm) Inches (in)

October Humidity in Charleston

In Charleston in October, humidity is 82%. With an average temperature of 10°C (50°F), this humidity feels like a dense, heavy blanket wrapping around you, making every step feel sluggish and the air thick, which can make traveling quite uncomfortable.

October Average Humidity in Charleston

This chart illustrates the average monthly humidity levels in Charleston, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Charleston is approximately 82%, offering insight into how humid the weather typically is during this month.

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

October UV Index in Charleston

In Charleston in October, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Charleston.

Maximum UV Index Levels in Charleston for October

The chart shows the monthly maximum UV Index (UVI) for Charleston in October, 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 October, the maximum UV index in Charleston typically reaches 5, which falls under the moderate exposure category.

Data source: Charleston October 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 October Weather in Charleston Compares to Other Months

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

This table compares monthly weather conditions in Charleston, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (21°F)	89 mm (3.5 inches)	88%	low
February Weather	-5°C (23°F)	81 mm (3.2 inches)	88%	moderate
March Weather	-1°C (30°F)	73 mm (2.9 inches)	85%	moderate
April Weather	6°C (43°F)	124 mm (4.9 inches)	81%	high
May Weather	12°C (54°F)	97 mm (3.8 inches)	76%	very high
June Weather	18°C (64°F)	84 mm (3.3 inches)	74%	very high
July Weather	21°C (70°F)	103 mm (4.0 inches)	74%	very high
August Weather	20°C (69°F)	82 mm (3.2 inches)	74%	very high
September Weather	16°C (61°F)	76 mm (3.0 inches)	77%	high
October Weather	10°C (50°F)	126 mm (5.0 inches)	82%	moderate
November Weather	2°C (36°F)	118 mm (4.6 inches)	85%	moderate
December Weather	-4°C (25°F)	113 mm (4.4 inches)	84%	low