Portland Weather in August

With daytime temperatures of 34°C (93°F) and nighttime lows of 26°C (79°F), August in Portland brings very high temperatures during the day. Some rainfall is to be expected during the month.

Rainfall in Portland in August

Historically, the month has about 7 days of rain, averaging 51 mm (2 in) in total. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.

Temperature in Portland in August

If you're visiting Portland in August, expect highs of 34°C (93°F) and overnight lows around 26°C (79°F). If you're spending a lot of time outdoors, it helps to plan around the warmer part of the day. At 26°C (79°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference. Note that these temperatures are average, but some days may be hotter. Dress in cool, breathable fabrics to stay comfortable in the heat.

Sunshine in Portland in August

There are approximately 301 hours of sunshine this month, resulting in mostly clear days.

If you prefer dry days with pleasant temperatures, August may not be the ideal month to visit Portland. Our weather planner can help you explore destinations with more pleasant weather conditions.