March Weather in Charleston, United States

Last updated: June 24, 2025

In March, the average temperature in Charleston, United States hovers around 7°C (44°F), with a minimum dipping to -17°C (2°F) and a maximum reaching 25°C (77°F). Expect about 125 mm (4.9 in) of precipitation spread across 12 days, alongside an average humidity level of 84% that adds to the region's characteristic chill.

March Temperature in Charleston

In March in Charleston, the average temperature is 7°C (44°F). The maximum can reach 25°C (77°F), and the minimum can be as low as -17°C (2°F). Be prepared for a wide range of temperatures if you plan 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 7°C (44°F), with highs reaching up to 25°C (77°F) and lows dropping to around -17°C (2°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 125 mm (4.9 in) spread over 12 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 125 mm (4.9 inches) of precipitation spread over approximately 12 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 84%. With an average temperature of 7°C (44°F), this humidity feels like a damp chill that seeps into your bones, making it uncomfortable for traveling and requiring extra layers to stay warm and dry.

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 84%, 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 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Charleston, you can refer to this 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 6, which falls under the 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	-1°C (30°F)	78 mm (3.1 inches)	84%	moderate
February Weather	1°C (33°F)	79 mm (3.1 inches)	82%	moderate
March Weather	7°C (44°F)	125 mm (4.9 inches)	84%	high
April Weather	12°C (53°F)	117 mm (4.6 inches)	83%	very high
May Weather	19°C (66°F)	135 mm (5.3 inches)	80%	very high
June Weather	24°C (76°F)	110 mm (4.3 inches)	83%	extreme
July Weather	25°C (78°F)	116 mm (4.6 inches)	82%	very high
August Weather	24°C (75°F)	123 mm (4.8 inches)	82%	very high
September Weather	21°C (71°F)	67 mm (2.6 inches)	79%	very high
October Weather	14°C (58°F)	115 mm (4.5 inches)	79%	high
November Weather	6°C (42°F)	89 mm (3.5 inches)	88%	moderate
December Weather	3°C (37°F)	65 mm (2.6 inches)	87%	moderate