Portland Weather in May
Portland in May sees pleasant temperatures, with highs around 22°C (72°F) and overnight lows of 9°C (48°F). Rainfall is fairly high at around 102 mm (4 in) on average, so pack waterproofs just in case.
Rainfall in Portland in May
The climate data from previous years indicates about 13 days of rain, averaging 102 mm (4 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Portland in May
Temperatures in Portland in May top out at 22°C (72°F) and drop to 9°C (48°F) overnight. The difference between afternoon and evening temperatures is usually noticeable. At 9°C (48°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.
Sunshine in Portland in May
Expect sunny days throughout the month, with an estimated 280 hours of sunshine. This makes it a pleasant time to visit Portland.If you prefer dry days with pleasant temperatures, June, July and September 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
9°C (48°F)
Max Temperature
22°C (72°F)
Chance of Rain
43%
Precipitation
102 mm (4 in)
Rainy days
13 days
Humidity
69% *
Sunshine
280 hours *
Percentage Sunshine
61% *
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
Comfortable temperatures call for an easy wardrobe in May. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.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.
