March Weather in Swansea, United States

Last updated: June 24, 2025

In March, the average temperature in Swansea, United States hovers around 15°C (58°F). Expect a minimum plunge to -4°C (24°F) and the occasional maximum rise to 32°C (89°F). With 76 mm (3.0 in) of precipitation spread over 9 days, prepare for some wet weather amidst an overall humidity level of 81%.

March Temperature in Swansea

In March in Swansea, the average temperature is 15°C (58°F). Maximum temperatures can reach 32°C (89°F), while minimums can drop as low as -4°C (24°F). Be prepared for a wide range of temperatures if you're planning to visit during this time.

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

The chart illustrates March temperature patterns in Swansea, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Swansea, March typically has an average temperature of 15°C (58°F), with highs reaching up to 32°C (89°F) and lows dropping to around -4°C (24°F).

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

March Precipitation in Swansea

In Swansea in March, the precipitation amount is 76 mm (3.0 in) spread over a period of 9 days.

March Precipitation Trends in Swansea

The chart displays monthly precipitation patterns in Swansea, 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 Swansea, March typically receives around 76 mm (3.0 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 Swansea

In Swansea in March humidity is 81%. With an average temperature of 15°C (58°F), this humidity feels like a mild, damp embrace that can make outdoor activities feel heavy and exhausting, requiring frequent breaks in the shade or a cool beverage to refresh yourself.

March Average Humidity in Swansea

This chart illustrates the average monthly humidity levels in Swansea, 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 Swansea is approximately 81%, 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 Swansea

In Swansea 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 Swansea.

Maximum UV Index Levels in Swansea for March

The chart shows the monthly maximum UV Index (UVI) for Swansea 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 Swansea typically reaches 8, which falls under the very high exposure category.

Data source: Swansea 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 Swansea Compares to Other Months

Weather in Swansea varies notably across the year, with each month offering distinct climate conditions. This page compares March’s weather to other months in Swansea, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Swansea, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (49°F)	83 mm (3.3 inches)	86%	moderate
February Weather	12°C (54°F)	100 mm (3.9 inches)	81%	high
March Weather	15°C (58°F)	76 mm (3.0 inches)	81%	very high
April Weather	19°C (66°F)	112 mm (4.4 inches)	79%	very high
May Weather	23°C (74°F)	105 mm (4.2 inches)	75%	extreme
June Weather	26°C (79°F)	121 mm (4.8 inches)	75%	extreme
July Weather	27°C (82°F)	154 mm (6.1 inches)	80%	extreme
August Weather	27°C (81°F)	141 mm (5.6 inches)	81%	extreme
September Weather	25°C (77°F)	98 mm (3.9 inches)	83%	very high
October Weather	20°C (69°F)	71 mm (2.8 inches)	78%	very high
November Weather	13°C (55°F)	61 mm (2.4 inches)	85%	high
December Weather	10°C (51°F)	129 mm (5.1 inches)	87%	moderate