Port Arthur (TX) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Port Arthur.
Climate overview of Port Arthur
Temperatures in Port Arthur, Texas, United States of America, vary greatly throughout the year. August is the hottest month at 33°C (91°F), while January is the coldest at 17°C (63°F).
The city receives considerable rainfall, with around 1489 mm (59 in) annually. July is the wettest month. It has very warm summers and mild winters.
Port Arthur Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Port Arthur - and find the best time to visit.
Monthly Temperature in Port Arthur
The climate in Port Arthur is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a very warm 33°C (91°F) in August to a moderate 17°C (63°F) in the coolest month, January.
Nights vary from 24°C (75°F) in August to around 6°C (43°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Port Arthur
Port Arthur has a notably wet climate with abundant precipitation, recording 1489 mm (59 in) of rainfall per year. The climate in Port Arthur shows significant variation throughout the year. Expect heavy rainfall in July, the wettest month, with an average of 219 mm (8.6 in) of precipitation over 16 rainy days.
In contrast, the driest month February offers drier and sunnier days, with around 80 mm (3.1 in) of rainfall over 9 rainy days. For more details, please visit our Port Arthur Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Port Arthur
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: March
- Warmest weather: June, July and August
- Seasonal pattern: Very warm summers and mild winters
Frequently asked questions about the climate in Port Arthur
What is the best time to visit Port Arthur?
March typically offers the most optimal weather in Port Arthur. In contrast, July and August tend to have less optimal conditions. Port Arthur has very warm summers and mild winters.
What temperatures can I expect in Port Arthur?
Daytime highs range from 17°C (63°F) in January to 33°C (91°F) in August. Nighttime lows range from 6°C (43°F) to 24°C (75°F). Temperatures vary considerably through the year.
How much rain does Port Arthur get?
Annual rainfall is around 1489 mm (59 in). July is the wettest month with 219 mm (8.6 in), while February is the driest with 80 mm (3.1 in).
Port Arthur 3-Day Forecast
Port Arthur (TX) 3-Day Forecast
Port Arthur on the map
Port Arthur is highlighted - select any city to see its climate.
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