Portland Weather in August

Portland in August averages 27°C (81°F) during the day and 15°C (59°F) at night. This is the wettest month of the year, and part of the summer season.

Rainfall in Portland in August

The month brings the most rain, so be prepared with an umbrella for the occasional shower. You can typically expect 11 days of rain this month, averaging around 109 mm (4.3 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Portland in August

Daytime highs in Portland in August reach 27°C (81°F), with nights around 15°C (59°F). August marks the summer season. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With overnight lows of 15°C (59°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Portland in August

The days are predominantly sunny, with an estimated total of around 278 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

If your ideal day consists of dry skies and pleasant temperatures, June, July and September typically offer the best circumstances for Portland.