Typical Weather in Portland, OR in May
68° F Avg High
49° F Avg Low
7 Rainy Days
☀️ Temperature Summary
Compared to other months, Portland experiences cooler conditions in May, with daytime highs averaging 68°F. Lows overnight are typically around 49°F.
May is a great time to visit Portland, with mild temperatures and sunny days being very common.
High Temps Throughout the Year
🎒 What to Pack
Pick up a few of these items to keep your trip fun and comfortable.
☔ Rain Summary
In May you can expect close to a 23% chance of rain for any given day. It rains less than usual in May, with total rainfall for the month typically near 2 inches.
Rainfall Throughout the Year
Planning a trip to Portland? Try our free trip weather planner