August Weather in Port Arthur, United States

Last updated: June 24, 2025

In Port Arthur, United States, the average temperature in August is a warm 28°C (83°F). You'll experience a range of temperatures, with minimums dipping to 22°C (71°F) and maximums reaching up to 35°C (95°F). Be prepared for some rain, as the area sees about 228 mm (9.0 in) of precipitation over 22 days. With an average humidity of 73%, it's a muggy month that calls for light, breathable clothing!

August Temperature in Port Arthur

In August in Port Arthur, the average temperature is 28°C (83°F). Maximums can reach 35°C (95°F), while minimums can drop to as low as 22°C (71°F). This weather makes Port Arthur an ideal destination for travelers looking to enjoy warm and pleasant conditions.

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

The chart illustrates August 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, August typically has an average temperature of 28°C (83°F), with highs reaching up to 35°C (95°F) and lows dropping to around 22°C (71°F).

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

August Precipitation in Port Arthur

In Port Arthur in August, the total precipitation amount is 228 mm (9.0 in) spread over 22 days.

August Precipitation Trends in Port Arthur

The chart displays monthly precipitation patterns in Port Arthur, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Port Arthur, August typically receives around 228 mm (9.0 inches) of precipitation spread over approximately 22 days.

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

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Millimeters (mm) Inches (in)

August Humidity in Port Arthur

In Port Arthur in August, humidity is 73%. With an average temperature of 28°C (83°F), this humidity feels like a thick blanket enveloping your skin, making travel feel heavy and stifling, often requiring frequent breaks in shaded or air-conditioned areas to stay comfortable.

August Average Humidity in Port Arthur

This chart illustrates the average monthly humidity levels in Port Arthur, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Port Arthur is approximately 73%, offering insight into how humid the weather typically is during this month.

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

August UV Index in Port Arthur

In Port Arthur in August, 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 August

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

Data source: Port Arthur August 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 August 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 August’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 August’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