Is Portland hot in May?
Days are typically mild at 20.1°C, while nights average 9.7°C.
United States · 1991–2020 normal
Portland in
May.
Typical May weather in Portland: 20.1°C by day, 9.7°C at night, 64 mm of rain over 9.5 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high20.1°C
Typical low9.7°C
Rain64 mm
Wet days9.5
In the year-round weather comparison, May scores 67 out of 100 (September leads the year at 93). Daylight is calculated as 14 h 52 from latitude 45.52°.
May at a glance
What is Portland like in May?
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Does it rain much?
The measured monthly average is 64 mm across about 10 wet days.
How much daylight is there?
There are about 14 h 52 between sunrise and sunset at mid-month, calculated from the place latitude.
Is May a good time to visit?
May ranks 5 of 12 in our weather comparison; September ranks first.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 5746545
- NOAA station
- USC00356749 · PORTLAND KGW-TV
- Station distance
- 1.2 km from the place centre
- Coverage
- Strong coverage · 29 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for Portland is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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