Portland Weather in August

August in Portland averages 15°C (59°F) during the day and 10°C (50°F) at night. It is the wettest month of the year, with 116 mm (4.6 in) of rainfall on average, so waterproof gear is a must.

Rainfall in Portland in August

An umbrella might come in handy since it is the wettest month of the year. Records from the past 30 years suggest around 10 days of rain, with 116 mm (4.6 in) average for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Portland in August

August in Portland brings typical temperatures with highs around 15°C (59°F) and lows of 10°C (50°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. At 10°C (50°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.

August in Portland can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.