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.

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

 

Portland, monthly averages in May

Min Temperature 9°C  

Max Temperature 20°C  

Chance of Rain 44%  

Precipitation 71 mm  

Rainy days 13 days  

Humidity 69%  

Windspeed 11 km/h  

Sunshine 276 hours  

Percentage 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.

Weather conditions Weather

Temperatures

Precipitation

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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 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.