Port Arthur

What is the climate like in Port Arthur?

The best time to visit Port Arthur is typically May – July, with trip comfort peaking in June (7.1/10). Port Arthur is warmest in July, when daily highs average 71°F (22°C), and coolest in January, when lows fall to about 21°F (-6°C). The wettest month is typically August and the driest is March; the year sees roughly 29 in (736 mm) of precipitation.

• Best time to visitMay – July — comfort peaks in June (7.1/10)
• Warmest monthJuly — average high 71°F (22°C)
• Coolest monthJanuary — average low 21°F (-6°C)
• Wettest monthAugust (4.1 in (105 mm))
• Driest monthMarch (1.5 in (39 mm))
• Annual precipitation29 in (736 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromTurku Turun Lentoasema, 8 km away (1952-2026)