Portland

What is the climate like in Portland?

The best time to visit Portland is typically August – October, with trip comfort peaking in September (7.4/10). Portland is warmest in July, when daily highs average 84°F (29°C), and coolest in January, when lows fall to about 23°F (-5°C). The wettest month is typically May and the driest is September; the year sees roughly 41 in (1053 mm) of precipitation.

• Best time to visitAugust – October — comfort peaks in September (7.4/10)
• Warmest monthJuly — average high 84°F (29°C)
• Coolest monthJanuary — average low 23°F (-5°C)
• Wettest monthMay (4.6 in (118 mm))
• Driest monthSeptember (2.6 in (65 mm))
• Annual precipitation41 in (1053 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromPortland 1 Sw, 2 km away (1964-2026)