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Air Quality History for Portland, United States

Historical PM2.5 and AQI trend from monitoring stations near Portland, United States.

25
Current AQI
Good CAMS model
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

240h

PM2.5 Station

240h · 1 station

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg Hours Stations
2026-07-22 18 5–53 4.5 µg/m³ 4h 1
2026-07-21 33 5–66 8.2 µg/m³ 14h 1
2026-07-20 57 12–134 17.8 µg/m³ 11h 1
2026-07-19 60 21–167 21.5 µg/m³ 13h 1
2026-07-18 44 23–72 11.0 µg/m³ 15h 1
2026-07-17 71 14–220 30.3 µg/m³ 13h 1
2026-07-16 59 26–224 27.6 µg/m³ 9h 1
2026-07-15 43 20–60 10.7 µg/m³ 12h 1
2026-07-14 36 12–58 8.9 µg/m³ 9h 1
2026-07-13 31 13–64 7.8 µg/m³ 16h 1
2026-07-12 27 11–67 6.8 µg/m³ 12h 1
2026-07-11 28 17–53 6.7 µg/m³ 11h 1
2026-07-10 34 17–92 9.0 µg/m³ 14h 1
2026-07-09 28 3–52 6.8 µg/m³ 9h 1
2026-07-08 33 10–51 7.9 µg/m³ 13h 1
2026-07-07 31 13–43 7.5 µg/m³ 13h 1
2026-07-06 24 14–45 5.8 µg/m³ 7h 1
2026-07-05 51 21–151 14.6 µg/m³ 15h 1
2026-07-04 30 5–53 7.2 µg/m³ 13h 1
2026-07-03 45 10–75 11.8 µg/m³ 11h 1
2026-07-02 45 22–67 11.5 µg/m³ 6h 1
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