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

Looking to travel to Portland in May? This guide provides all the details you need.

In Portland the weather in May is generally perfect, characterized by pleasant temperatures and moderate rainfall. Daytime temperatures hover around 20°C, while nights can cool down to about 9°C.

Portland in May usually receives moderate rainfall, averaging around 71 mm for the month. When we look at the climate data from the last 30 years, we can expect around 13 days of rain.

The days are predominantly sunny, with an estimated total of around 276 hours of sunshine. This amount of sunlight does not only brightens the days but also contributes to a cheerful ambiance in the area during this month.

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 in May and which places have the best weather 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 Portland in May?

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 in May.

Cycling

9/10

Walking

9/10

Barbeque

8/10

Camping

4/10

Outdoor sports

9/10

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.