Portland Weather in August

In Portland, August brings high daytime temperatures around 25°C (77°F), with nights cooling to 15°C (59°F). Expect quite a bit of rainfall this month.

Rainfall in Portland in August

Historically, the month has about 10 days of rain, averaging 108 mm (4.3 in) in total. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Portland in August

Daytime highs in Portland in August reach 25°C (77°F), with nights around 15°C (59°F). August is in the summer season. Overall, the month follows a fairly predictable daily temperature pattern. With lows of 15°C (59°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Portland in August

There are approximately 267 hours of sunshine this month, resulting in mostly clear days.

Average water temperature in August

With water at 18°C (64°F), swimming is comfortable for most people. It feels refreshing rather than cold, though it depends a bit on personal preference.

If you're inclined towards comfortable temperatures and drier conditions, August is a good time to visit Portland.