March Weather in Port Arthur, United States

Last updated: June 24, 2025

In Port Arthur, United States, the average temperature in March hovers around 18°C (65°F), with the mercury dipping as low as 0°C (32°F) and peaking at 29°C (85°F). You can expect 76 mm (3.0 in) of precipitation spread over about 12 days, contributing to an average humidity of 78%.

March Temperature in Port Arthur

In March in Port Arthur, the average temperature is 18°C (65°F), with maximums reaching up to 29°C (85°F) and minimums dropping as low as 0°C (32°F). This mild weather makes Port Arthur a perfect destination for travelers looking to explore comfortably during this time of year.

March Weather in Port Arthur: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Port Arthur, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Port Arthur, March typically has an average temperature of 18°C (65°F), with highs reaching up to 29°C (85°F) and lows dropping to around 0°C (32°F).

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

March Precipitation in Port Arthur

In Port Arthur in March, the total precipitation amount is 76 mm (3.0 in), occurring over the course of 12 days.

March Precipitation Trends in Port Arthur

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

In Port Arthur in March, humidity is 78%. With an average temperature of 18°C (65°F), this humidity feels like a warm, enveloping blanket, making travel quite muggy and potentially uncomfortable, as it can leave you feeling sticky and fatigued more quickly than usual.

March Average Humidity in Port Arthur

This chart illustrates the average monthly humidity levels in Port Arthur, 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 Port Arthur is approximately 78%, 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 Port Arthur

In Port Arthur in March, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Port Arthur.

Maximum UV Index Levels in Port Arthur for March

The chart shows the monthly maximum UV Index (UVI) for Port Arthur 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 Port Arthur typically reaches 9, which falls under the very high exposure category.

Data source: Port Arthur 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 Port Arthur Compares to Other Months

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

This table compares monthly weather conditions in Port Arthur, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	98 mm (3.8 inches)	79%	moderate
February Weather	14°C (58°F)	90 mm (3.5 inches)	80%	very high
March Weather	18°C (65°F)	76 mm (3.0 inches)	78%	very high
April Weather	21°C (69°F)	125 mm (4.9 inches)	81%	extreme
May Weather	25°C (77°F)	189 mm (7.4 inches)	79%	extreme
June Weather	27°C (82°F)	181 mm (7.1 inches)	75%	extreme
July Weather	28°C (83°F)	153 mm (6.0 inches)	74%	extreme
August Weather	28°C (83°F)	228 mm (9.0 inches)	73%	extreme
September Weather	27°C (80°F)	202 mm (8.0 inches)	75%	very high
October Weather	22°C (73°F)	143 mm (5.6 inches)	75%	very high
November Weather	16°C (62°F)	74 mm (2.9 inches)	79%	high
December Weather	14°C (58°F)	140 mm (5.5 inches)	83%	moderate