nomadseason

October Weather in Charleston, United States

Last updated: June 24, 2025

In October, the average temperature in Charleston, United States hovers around 19°C (67°F). However, temperatures can swing from a chilly 0°C (33°F) to a sweltering 37°C (99°F). Expect a total precipitation of 113 mm (4.5 in) spread over about 9 days, and with an average humidity level of 76%, you're likely to experience a warm and humid climate.

October Temperature in Charleston

In October in Charleston, the average temperature is 19°C (67°F). Maximums can reach 37°C (99°F), while minimums can drop as low as 0°C (33°F). Be prepared for a wide range of temperatures when traveling during this time.

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 19°C (67°F), with highs reaching up to 37°C (99°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec454958637279828177665249
Data source: Temperature data for Charleston generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in Charleston

In Charleston in October, the precipitation amount is 113 mm (4.5 in) over a span of 9 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 113 mm (4.5 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec12019516814911513411212410011384143
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

October Humidity in Charleston

In Charleston in October, humidity is 76%. With an average temperature of 19°C (67°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities a bit sluggish and requiring regular breaks to stay hydrated while exploring.

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 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%80%82%83%80%80%75%73%76%84%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.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111109764
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 Weather7°C (45°F)120 mm (4.7 inches)84%moderate
February Weather10°C (49°F)195 mm (7.7 inches)83%high
March Weather14°C (58°F)168 mm (6.6 inches)80%very high
April Weather17°C (63°F)149 mm (5.9 inches)82%very high
May Weather22°C (73°F)115 mm (4.5 inches)83%extreme
June Weather26°C (79°F)134 mm (5.3 inches)80%extreme
July Weather28°C (82°F)112 mm (4.4 inches)80%extreme
August Weather27°C (81°F)124 mm (4.9 inches)75%very high
September Weather25°C (78°F)100 mm (3.9 inches)73%very high
October Weather19°C (67°F)113 mm (4.5 inches)76%high
November Weather11°C (53°F)84 mm (3.3 inches)84%high
December Weather10°C (50°F)143 mm (5.6 inches)88%moderate

Compare Charleston's Climate with Cities Worldwide