25
Good · Dominant pollutant: PM2.5
Air quality is satisfactory; air pollution poses little or no risk.
The current Air Quality Index (AQI) in Portland is 25, categorized as Good. Air quality is satisfactory; air pollution poses little or no risk.
Pollutants & conditions
| Measurement | Value |
|---|
| PM2.5 | 25 |
| Ozone (O₃) | 0.1 |
| Nitrogen Dioxide (NO₂) | 8.4 |
| Carbon Monoxide (CO) | 0.1 |
| Temperature (°C) | 11.1 |
| Humidity (%) | 91.5 |
| Pressure (hPa) | 1019.4 |
PM2.5 forecast
| Date | Avg | Min | Max |
|---|
| 2026-05-19 | 9 | 8 | 9 |
| 2026-05-20 | 14 | 9 | 20 |
| 2026-05-21 | 29 | 18 | 46 |
| 2026-05-22 | 16 | 11 | 31 |
| 2026-05-23 | 13 | 9 | 16 |
Nearby cities
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