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

What weather conditions can you expect in Portland this May? Wondering about the weather this month? Our guide has all the details you need.

Temperatures

The weather in Portland is usually perfect in May, featuring pleasant temperatures and moderate rainfall. In the daytime, temperatures tend to hover near 20°C, cooling down at night to around 9°C.

Precipitation

Portland in May usually receives moderate rainfall, averaging around 71 mm for the month. Typically, you can expect about 13 days of rain this month.

Average sunshine

With approximately 276 hours hours of sun, the days are filled with brightness. It makes it a perfect month for outdoor activities.

If you're inclined towards comfortable temperatures and drier conditions, May 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.

Need inspiration to choose your next destination? Our innovative weather planner helps you discover the perfect getaway tailored to your ideal climate conditions.

Select a Month of Interest

Check the conditions for any month of the year.

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, monthly averages in May

Min TemperatureMin Temperature 9°C  
Max TemperatureMax Temperature 20°C  
Chance of RainChance of Rain 44%  
PrecipitationPrecipitation 71 mm  
Rainy daysRainy days 13 days  
HumidityHumidity 69%  
WindspeedWindspeed 3 m/s  
SunshineSunshine 276 hours  
Percentage SunshinePercentage Sunshine  

Where to go in the United States of America in May

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

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In May generally
perfect weather
with pleasant temperatures
and moderate monthly rainfall

More information

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).

Select a Month of Interest

Check the conditions for any month of the year.

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.

So, what should you wear in this month?

For visitors traveling to Portland, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

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

Cycling
9/10
Walking
9/10
Barbeque
8/10
Camping
4/10
Outdoor sports
9/10

Interested in more climate information?

This site 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 travel conditions. Find out where to go with our weather planner.