Portland

What is the climate like in Portland?

The best time to visit Portland is typically July – August, with trip comfort peaking in July (7.1/10). Portland is warmest in August, when daily highs average 65°F (18°C), and coolest in January, when lows fall to about 43°F (6°C). The wettest month is typically October and the driest is July; the year sees roughly 40 in (1027 mm) of precipitation.

• Best time to visitJuly – August — comfort peaks in July (7.1/10)
• Warmest monthAugust — average high 65°F (18°C)
• Coolest monthJanuary — average low 43°F (6°C)
• Wettest monthOctober (5.3 in (135 mm))
• Driest monthJuly (1.8 in (46 mm))
• Annual precipitation40 in (1027 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromSwanage, 35 km away (1959-2026)