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.