Portland Weather in May
May in Portland typically sees daytime highs of 30°C (86°F) and nighttime lows of 22°C (72°F). Rainfall is also possible this month, so it's worth packing an umbrella.
Rainfall in Portland in May
Historically, approximately 6 days this month are expected to have rain, averaging 85 mm (3.3 in). Rainfall tends to arrive in short, intense showers this month. Rain days are few, but the showers can be surprisingly heavy.
Temperature in Portland in May
May in Portland brings high temperatures, with highs of 30°C (86°F) and nights around 22°C (72°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With lows of 22°C (72°F), the nights are warm and generally comfortable.
Sunshine in Portland in May
Enjoy a sunny month with about 237 hours of sunshine, the clear skies make Portland even more beautiful.If you prefer enjoying temperate temperatures and rain-free days, February, March, April, October, November and December typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
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 Temperature in May
Min Temperature
22°C (72°F)
Max Temperature
30°C (86°F)
Chance of Rain
21%
Precipitation
85 mm (3.3 in)
Rainy days
6 days
Humidity
79% *
Sunshine
237 hours *
Percentage Sunshine
55% *
Best Places 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. See all of the United States of America in May →
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What to Wear in Portland in May
Warm but pleasant conditions in Portland in May. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Portland in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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.
Temperature Rainfall Sunshine Humidity
See the full Portland climate overview or explore weather in the United States of America.
