What May feels like in Portland
In Portland, May brings late spring. Afternoons are mild and comfortable for most people in light layers. Once the sun goes down the air changes: nights are cool. Humidity is on the high side, but mild temperatures keep it comfortable.
Rain in Portland in May
It is a changeable month: rain comes about one day in 3, with dry spells in between. Wet days average about 6.9 mm (0.3 in), enough to soak you without an umbrella. That is lighter than the city's yearly norm of about 8.9 mm per rainy day.
Daylight and sunshine in May
Mid-month, Portland gets 14 h 52 min of daylight, from sunrise near 5:41 am to sunset near 8:33 pm. Since mid-April the day has gained 1 h 24 min. About 70% of daylight hours are sunny; in short, there are plenty of bright spells.
How May compares to the rest of the year
In Portland's temperature order, May sits as the 5th warmest month. Afternoons run 4.3°C (7.7°F) warmer than in April, with 35 mm less rain. The warm-up continues into June. June averages a high of 22.5°C (72.5°F).
Who May suits
- Sightseeing: a good fit — daytime temperatures are fine for walking around.
- Parks & outdoor: a good fit — pleasant for gardens, parks and riversides.
- Hiking: a good fit — mild temperatures for trails.
Tips for visiting Portland in May
Versatile Layers
Mornings and evenings are cooler than midday, so dress in layers.
Rain Protection
A packable rain jacket saves the day on showery afternoons.
Sunglasses
Frequent sunshine — sunglasses and a light hat.
Quick questions
How warm is Portland in May?
It feels mild: typical highs are 19°C (66.2°F), with lows near 8.6°C (47.5°F).
Does it rain a lot in Portland in May?
Yes, fairly — rain falls about one day in 3 and totals about 75 mm, so an umbrella is worth carrying.
What should I wear in Portland in May?
Pack versatile layers, rain protection and sunglasses. Bring something extra for the cooler evenings.
Is May or June better for visiting Portland?
June scores better on our climate ranking (#4 of 12 vs #5), rated Great against Good. June is warmer and has fewer rainy days.