Portland weather in August (Oregon, United States of America)

What can you expect from the weather in Portland during August? This guide provides all the details you need.

In Portland the weather in August is generally perfect, characterized by high temperatures and low rainfall. August falls within the summer season. Throughout the day, temperatures typically settle at around 28°C. But by evening, they drop to around 14°C. Often, it stands out as the year's warmest month. With this in mind, cool breathable fabrics will make navigating the heat much more bearable. Always be ready to embrace the warmth while staying cool and protected.

Portland in August usually receives low rainfall, averaging around 11 mm for the month. It's the month with the least rainfall. Whether you're keen on hiking, outdoor festivals, or just enjoying a walk in the park, this month provides a reliably dry backdrop for all your plans. When we look at the climate data from the last 30 years, we can expect around 3 days of rain.

With around 298 hours of sunshine, the days are mostly sunny. It gives a pleasant and vibrant feel to the area.

If you're inclined towards comfortable temperatures and drier conditions, August is a prime time to visit Portland. May, June, July, August and September typically offer the best circumstances. While January, March, November and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Portland climate page with graphs.

 

Portland, monthly averages in August

Min TemperatureMin Temperature 14°C  
Max TemperatureMax Temperature 28°C  
Chance of RainChance of Rain 10%  
PrecipitationPrecipitation 11 mm  
Rainy daysRainy days 3 days  
HumidityHumidity 65%  
WindspeedWindspeed 11 km/h  
SunshineSunshine 298 hours  
Percentage SunshinePercentage Sunshine  

Where to go in the United States of America in August

Find out more about the weather in the United States of America in August and which places have the best weather conditions in this month.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Portland in August?

It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool.

What To Do

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

Swimming
10/10
Cycling
8/10
Walking
8/10
Barbeque
10/10
Camping
10/10
Outdoor sports
8/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Portland.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.