Port Arthur Weather & Climate: Best Time to Visit

With minimal seasonal shifts, Port Arthur experiences a constant climate year-round. Average maximum daytime temperatures range from a pleasant 19°C (66°F) in February, the warmest time of the year, to a moderate 13°C (55°F) during cooler months like July.

At night, you can expect temperatures ranging from 14°C (57°F) in February to around 9°C (48°F) during July.

Check out our detailed temperature page for more information.

Temperature ranges by month

Generally, Port Arthur receives mid-range precipitation levels, with 763 mm (30 in) annually. Year-round, Port Arthur has a balanced climate with minimal variation in precipitation. The difference between the wettest month, August, with 74 mm (2.9 in), and the driest month, February, with 58 mm (2.3 in), is minimal. 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

Seasonal changes in sunshine hours are quite dramatic in Port Arthur. While January receives considerable daily sunshine with up to 8.4 hours, June marks the darkest time of the year, where sunshine is scarce with only 4.4 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is moderate throughout the year in Port Arthur.

The city experiences its highest humidity in June, reaching 64%. In December, the humidity drops to its lowest level at 49%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year