May Weather in Port Arthur, United States

Last updated: June 24, 2025

In May, the average temperature in Port Arthur, United States is a pleasant 25°C (77°F). During this time, temperatures can range from a cool 13°C (55°F) to a warm 34°C (94°F). Expect 189 mm (7.4 in) of precipitation over approximately 14 days, contributing to an average humidity of 79%. Enjoy the balmy climate while being prepared for occasional showers!

May Temperature in Port Arthur

In May in Port Arthur, the average temperature is 25°C (77°F). Maximums can reach 34°C (94°F), while minimums can drop to as low as 13°C (55°F). This diverse range of temperatures makes Port Arthur an ideal destination for travelers seeking a pleasant climate.

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

The chart illustrates May 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, May typically has an average temperature of 25°C (77°F), with highs reaching up to 34°C (94°F) and lows dropping to around 13°C (55°F).

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

May Precipitation in Port Arthur

In Port Arthur in May, the precipitation amount is 189 mm (7.4 in) over the course of 14 days.

May Precipitation Trends in Port Arthur

The chart displays monthly precipitation patterns in Port Arthur, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Port Arthur, May typically receives around 189 mm (7.4 inches) of precipitation spread over approximately 14 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Port Arthur

In Port Arthur in May, humidity is 79%. With an average temperature of 25°C (77°F), this humidity feels like a warm blanket wrapping around you, making travel feel slightly sluggish but pleasantly tropical.

May Average Humidity in Port Arthur

This chart illustrates the average monthly humidity levels in Port Arthur, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Port Arthur is approximately 79%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Port Arthur

In Port Arthur in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Port Arthur.

Maximum UV Index Levels in Port Arthur for May

The chart shows the monthly maximum UV Index (UVI) for Port Arthur in May, 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 May, the maximum UV index in Port Arthur typically reaches 11, which falls under the extreme exposure category.

Data source: Port Arthur May 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 May 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 May’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 May’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