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October Weather in Charleston, United States

Last updated: June 24, 2025

The average temperature in Charleston, United States during October is a mild 16°C (62°F), with fluctuations that can see the minimum drop to 0°C (32°F) and the maximum rise to 34°C (93°F). Expect 122 mm (4.8 in) of precipitation spread over 10 days, accompanied by a comfortable average humidity of 74%.

October Temperature in Charleston

In October in Charleston, the average temperature is 16°C (62°F). Maximum temperatures can reach 34°C (93°F), while minimum temperatures can drop as low as 0°C (32°F). Travelers should be prepared for a range of weather conditions, from warm days to chilly nights.

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 16°C (62°F), with highs reaching up to 34°C (93°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec374151587077817874624743
Data source: Temperature data for Charleston generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in Charleston

In Charleston in October, the total precipitation amount reaches 122 mm (4.8 in) over the course of 10 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 122 mm (4.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec1101391691411511121011028512210197
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Charleston

In Charleston in October, humidity is 74%. With an average temperature of 16°C (62°F), this humidity feels like a warm, heavy blanket enveloping you, making it slightly uncomfortable for traveling as it can lead to a sticky sensation that may sap your energy during outdoor activities.

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 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%84%80%82%83%80%76%75%75%85%88%
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 is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, 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 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710111110109753
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.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)110 mm (4.3 inches)86%moderate
February Weather5°C (41°F)139 mm (5.5 inches)84%high
March Weather10°C (51°F)169 mm (6.6 inches)84%high
April Weather14°C (58°F)140 mm (5.5 inches)80%very high
May Weather21°C (70°F)151 mm (6.0 inches)82%extreme
June Weather25°C (78°F)112 mm (4.4 inches)83%extreme
July Weather27°C (81°F)101 mm (4.0 inches)79%very high
August Weather25°C (78°F)102 mm (4.0 inches)76%very high
September Weather23°C (74°F)85 mm (3.3 inches)75%very high
October Weather16°C (62°F)122 mm (4.8 inches)74%high
November Weather8°C (47°F)101 mm (4.0 inches)85%moderate
December Weather6°C (43°F)97 mm (3.8 inches)88%moderate

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