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.

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For a detailed overview over the year and the best time to visit the United States of America, check out our Portland's climate page.

Portland Temperature in August

Min Temperature 26°C (79°F)  

Max Temperature 34°C (93°F)  

Chance of Rain 25%  

Precipitation 51 mm (2 in)  

Rainy days 7 days  

Humidity 74% *  

Sunshine 301 hours *  

Percentage Sunshine 73% *  

* Data from: Corpus Christi, the United States of America (11 KM, 6 Miles).

What to Wear in Portland in August

Get ready for hot weather in August! Lightweight, breathable fabrics are your best friend during this month. Cotton and linen shirts, shorts, sundresses, and sandals will keep you comfortable. Light colors help reflect the heat, avoid wearing black. Rain is likely on several days, so bring a good rain jacket. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Portland in August

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

10/10

Cycling

8/10

Walking

8/10

Barbeque

10/10

Camping

7/10

Outdoor sports

8/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Portland's climate page.

More climate data for Portland

Temperature Rainfall Sunshine Humidity

See the full Portland climate overview or explore weather in the United States of America.