Portland weather in May 2025

Expect 66°F daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Portland in May. Check more long-term weather averages for Portland in May before you book your next holiday to Oregon in 2025/2026.

  • 66°F maximum daytime temperature in May in Portland66
    66°F max day temperature
  • 9 hours of sunshine per day
  • 11 days with some rainfall in May in Portland11
    11 days with some rainfall
  • 45°F minimum night-time temperature in May in Portland45
    45°F min night temperature
  • 15 hours of daylight per day in May in Portland15
    15 hours of daylight per day
  • No heat & humidity in May in Portland0
    No heat & humidity
  • 2.2 inches monthly rainfall in May in Portland2.2
    2.2 inches of monthly rainfall
  • UV (maximum) index 6 (High) in May in Portland6
    6 (High) UV index

More about Portland

Portland by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Oregon

Hawaiian Airlines: Top deals on flights to/from Hawaii

  • Save on flights to/from Hawaii with Hawaiian Airlines
  • Browse popular routes & find best fares
  • Plus check out top tips on flying to Hawaii & more
Go to Hawaiian Airlines deal >>

The May weather guide for Oregon (Portland) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

Back to top

More about the USA

How hot is it in Portland in May?

Daytime temperatures usually reach 66°F in Portland in May, falling to 45°F at night.

How sunny is it in Portland in May?

There are normally 9 hours of bright sunshine each day in Portland in May - that's 60% of daylight hours.

Does it rain in Portland in May?

There are usually 11 days with some rain in Portland in May and the average monthly rainfall is 2.2 inches.

Portland May sunrise & sunset times

Browse the sunrise and sunset times for Portland in May 2025. Select a month to view Portland sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:58 19:18
Friday, 16th May 2025 04:38 19:36
Saturday, 31st May 2025 04:26 19:52

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^