Air Quality History for Portland, United States
Historical PM2.5 and AQI trend from monitoring stations near Portland, United States.
27
Current AQI
Good CAMS model
Good CAMS model
Air Quality Index Station
214hPM2.5 Station
214h · 1 stationTemperature GFS model
80ptPrecipitation GFS model
mm/dayDaily Summary Station
| Date | AQI | Range | PM2.5 avg | Hours | Stations |
|---|---|---|---|---|---|
| 2026-05-30 | 13 | 13–13 | 3.1 µg/m³ | 1h | 1 |
| 2026-05-29 | 27 | 13–38 | 6.4 µg/m³ | 11h | 1 |
| 2026-05-28 | 24 | 11–44 | 5.7 µg/m³ | 13h | 1 |
| 2026-05-27 | 23 | 9–62 | 5.8 µg/m³ | 13h | 1 |
| 2026-05-26 | 23 | 5–56 | 5.5 µg/m³ | 11h | 1 |
| 2026-05-25 | 21 | 5–44 | 5.1 µg/m³ | 13h | 1 |
| 2026-05-24 | 25 | 11–50 | 6.1 µg/m³ | 13h | 1 |
| 2026-05-23 | 16 | 3–36 | 3.9 µg/m³ | 9h | 1 |
| 2026-05-22 | 16 | 5–31 | 3.9 µg/m³ | 9h | 1 |
| 2026-05-21 | 20 | 13–27 | 4.8 µg/m³ | 8h | 1 |
| 2026-05-20 | 34 | 18–68 | 8.8 µg/m³ | 12h | 1 |
| 2026-05-19 | 32 | 11–50 | 7.7 µg/m³ | 9h | 1 |
| 2026-05-18 | 46 | 5–76 | 12.1 µg/m³ | 11h | 1 |
| 2026-05-17 | 36 | 15–53 | 8.8 µg/m³ | 8h | 1 |
| 2026-05-16 | 23 | 14–36 | 5.4 µg/m³ | 10h | 1 |
| 2026-05-15 | 34 | 10–71 | 9.1 µg/m³ | 9h | 1 |
| 2026-05-14 | 34 | 20–53 | 8.2 µg/m³ | 10h | 1 |
| 2026-05-13 | 32 | 10–47 | 7.6 µg/m³ | 12h | 1 |
| 2026-05-12 | 34 | 11–109 | 9.4 µg/m³ | 13h | 1 |
| 2026-05-11 | 23 | 6–42 | 5.6 µg/m³ | 11h | 1 |
| 2026-05-10 | 26 | 12–42 | 6.4 µg/m³ | 8h | 1 |