United States
Good
Air quality in Portland is good. Safe for outdoor exercise.
Excellent
Excellent conditions: ideal for running
Data from Open-Meteo • Updated 12:09 AM PDT
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Portland, Oregon, usually has clean air for running, helped by frequent Pacific weather systems and rain for much of the year. The main exception is wildfire smoke in late summer and early autumn: in September 2020, smoke briefly gave Portland some of the worst air of any major city in the world. Forest Park's Wildwood Trail and the Willamette River waterfront loop are popular running routes.
Based on hourly averages, 2023–2025 · Data: Open-Meteo / CAMS
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<a href="https://www.aeriqo.app/cities/portland"><img src="https://www.aeriqo.app/api/badge/portland" width="300" height="64" alt="Live air quality in Portland (Aeriqo)" loading="lazy"></a>
Portland's monthly average AQI over 2023–2025 stayed between about 32 and 45, in the Good range. During wildfire smoke episodes, usually in August and September, readings can climb above 150.
July had the cleanest monthly average. From August to October, check smoke forecasts and the AQI before every run, because smoke can arrive with little warning.
Deep dive into pollutants, thresholds, and how air quality affects your running performance.
Quick threshold lookup for every AQI level. Know when to run and when to stay indoors.
Practical rules for training during smoke events: when to go indoors and how to recover.
