Portland Weather in May
United States · 30-year monthly averages
🌟 Great time to visit
May in Portland is pleasantly warm, with average daytime highs around 21°C (69°F) and nighttime lows near 10°C (49°F). Expect roughly 64mm of precipitation spread over about 10 rainy days, with a moderate amount of rain.
Avg high
21°C
69°F
Avg low
10°C
49°F
Rainfall
64mm
moderate
Rainy days
10
days with ≥1mm
🎒 What to pack
- light layers
- comfortable walking shoes
May vs the rest of the year
FAQ
- How hot is Portland in May?
- May in Portland is pleasantly warm, with average daytime highs around 21°C (69°F) and nighttime lows near 10°C (49°F). Expect roughly 64mm of precipitation spread over about 10 rainy days, with a moderate amount of rain.
- Does it rain a lot in Portland in May?
- Portland sees around 64mm of precipitation in May on average — moderate by global standards.
- Is May a good time to visit Portland?
- May is one of the best months to visit Portland — comfortable temperatures and manageable rainfall.