Typical Run Score
91
Great
Portland · May
Running in Portland in May
Typical May running conditions in Portland, and a live Run Score so you can see how today compares with the norm.
Avg temperature
55°F
Ideal
Avg dew point
47°F
Comfortable
Best window
6–11 AM
Local time
Portland · today vs the May normTemperature · dew point · wind · timing
How May compares in Portland
May ranks 1st of 12 months for running in Portland, with a typical daytime Run Score of 91 (Great). It's the best running month of the year here: temperatures around 55°F (13°C) and comfortable dew points. Precipitation falls in roughly 24% of hours this month. Use the live tool below to see how today actually compares with the May norm.
Running weather in nearby cities
Same engine, different climate. Check the best time to run in these cities too.
Running in Portland in May: FAQ
Is it good to run in Portland in May?
Yes, it's one of the better months to run here. The typical daytime Run Score is 91 (Great), with temperatures around 55°F (13°C) and comfortable dew points. The best window is usually 6–11 AM.
How hot is it for running in Portland in May?
Typical temperatures average 55°F (13°C) (Ideal) with dew points near 47°F. Dew point (not the thermometer) usually decides how hard the run feels.
What is a good Run Score?
Scores run 0–100. 80–100 is Great (97+ earns a gold star for near-perfect conditions). 65–79 (Good) is solid. 45–64 (Fair) means at least one factor (usually heat or dew point) is slowing you. Below 45 (Poor), expect a noticeably harder effort or hold back for safety.
Why does dew point matter more than temperature?
Your body cools by evaporating sweat. When the dew point climbs above roughly 60°F, the air is too saturated for sweat to evaporate efficiently, so heat builds up even if the thermometer looks reasonable. That's why a 70°F muggy morning can feel harder than a dry 80°F afternoon.
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