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March Weather in Charleston, United States

Last updated: June 24, 2025

In March, the average temperature in Charleston, United States hovers around 12°C (54°F). Expect a range that dips to a chilly -8°C (18°F) or peaks at a warm 29°C (85°F). With 157 mm (6.2 in) of precipitation spread over 13 days, don’t forget your umbrella! Additionally, the average humidity is a notable 86%, creating a distinctly moist atmosphere.

March Temperature in Charleston

In March in Charleston, the average temperature is 12°C (54°F). Maximums can reach 29°C (85°F) and minimums can be as low as -8°C (18°F). Be prepared for a wide range of temperatures when traveling to Charleston in March.

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

The chart illustrates March 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, March typically has an average temperature of 12°C (54°F), with highs reaching up to 29°C (85°F) and lows dropping to around -8°C (18°F).
JanFebMarAprMayJunJulAugSepOctNovDec434854617076807874645046
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.

March Precipitation in Charleston

In Charleston in March, the total precipitation amount is 157 mm (6.2 in) spread over 13 days.

March Precipitation Trends in Charleston

The chart displays monthly precipitation patterns in Charleston, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Charleston, March typically receives around 157 mm (6.2 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec94165157149111991031269412475129
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Charleston

In Charleston in March, humidity is 86%. With an average temperature of 12°C (54°F), this humidity feels like a damp blanket wrapping around you, making outdoor activities uncomfortable and travel challenging due to the heavy, muggy atmosphere.

March Average Humidity in Charleston

This chart illustrates the average monthly humidity levels in Charleston, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Charleston is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%82%85%85%83%76%76%80%88%88%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Charleston

In Charleston in March, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Charleston.

Maximum UV Index Levels in Charleston for March

The chart shows the monthly maximum UV Index (UVI) for Charleston in March, 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 March, the maximum UV index in Charleston typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109763
Data source: Charleston March 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 March 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 March’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 March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)94 mm (3.7 inches)86%moderate
February Weather9°C (48°F)165 mm (6.5 inches)86%high
March Weather12°C (54°F)157 mm (6.2 inches)86%very high
April Weather16°C (61°F)149 mm (5.9 inches)82%very high
May Weather21°C (71°F)111 mm (4.4 inches)85%extreme
June Weather24°C (76°F)99 mm (3.9 inches)85%extreme
July Weather27°C (80°F)103 mm (4.1 inches)83%extreme
August Weather26°C (78°F)126 mm (5.0 inches)76%very high
September Weather24°C (75°F)94 mm (3.7 inches)76%very high
October Weather18°C (65°F)124 mm (4.9 inches)80%high
November Weather10°C (51°F)75 mm (2.9 inches)88%high
December Weather8°C (47°F)129 mm (5.1 inches)88%moderate

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