March Weather in Charleston, United States

Last updated: June 24, 2025

In Charleston, United States, the average temperature in March hovers around -1°C (30°F), with a potential minimum dipping as low as -22°C (-8°F) and a maximum reaching up to 20°C (68°F). The month sees approximately 73 mm (2.9 in) of precipitation over 9 days, accompanied by an average humidity level of 85%. Be prepared for chilly weather and a fair dose of dampness!

March Temperature in Charleston

In March in Charleston, the average temperature is -1°C (30°F), with highs reaching up to 20°C (68°F) and lows dipping to -22°C (-8°F). Be prepared for a wide range of temperatures if you're planning to travel during this time!

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 -1°C (30°F), with highs reaching up to 20°C (68°F) and lows dropping to around -22°C (-8°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 precipitation amount is 73 mm (2.9 in), occurring over the course of 9 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 73 mm (2.9 inches) of precipitation spread over approximately 9 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

March Humidity in Charleston

In Charleston in March humidity is 85%. With an average temperature of -1°C (30°F), this humidity feels like a heavy, damp blanket that envelops you, making even short excursions outside feel chilling and uncomfortable.

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 85%, 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 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 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 5, which falls under the moderate 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 (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