March Weather in Charleston, United States

Last updated: June 24, 2025

In March, the average temperature in Charleston, United States hovers around 14°C (58°F), with a minimum dipping to -4°C (25°F) and a maximum soaring to 30°C (86°F). Rain or shine, expect 168 mm (6.6 in) of precipitation over approximately 14 days, along with an average humidity of 80%. Stay prepared for a mix of weather!

March Temperature in Charleston

In March in Charleston, the average temperature is 14°C (58°F), with maximums reaching 30°C (86°F) and minimums dropping as low as -4°C (25°F). This varied climate makes it essential for travelers to pack for both warm and cool weather during their visit.

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 14°C (58°F), with highs reaching up to 30°C (86°F) and lows dropping to around -4°C (25°F).

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

March Precipitation in Charleston

In Charleston in March, the total precipitation amount is 168 mm (6.6 in) over a span of 14 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 168 mm (6.6 inches) of precipitation spread over approximately 14 days.

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

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Millimeters (mm) Inches (in)

March Humidity in Charleston

In Charleston in March humidity is 80%. With an average temperature of 14°C (58°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities sweltering and uncomfortable for travel.

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 80%, offering insight into how humid the weather typically is during this month.

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.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (45°F)	120 mm (4.7 inches)	84%	moderate
February Weather	10°C (49°F)	195 mm (7.7 inches)	83%	high
March Weather	14°C (58°F)	168 mm (6.6 inches)	80%	very high
April Weather	17°C (63°F)	149 mm (5.9 inches)	82%	very high
May Weather	22°C (73°F)	115 mm (4.5 inches)	83%	extreme
June Weather	26°C (79°F)	134 mm (5.3 inches)	80%	extreme
July Weather	28°C (82°F)	112 mm (4.4 inches)	80%	extreme
August Weather	27°C (81°F)	124 mm (4.9 inches)	75%	very high
September Weather	25°C (78°F)	100 mm (3.9 inches)	73%	very high
October Weather	19°C (67°F)	113 mm (4.5 inches)	76%	high
November Weather	11°C (53°F)	84 mm (3.3 inches)	84%	high
December Weather	10°C (50°F)	143 mm (5.6 inches)	88%	moderate