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Air Quality History for Portland, United States

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

47
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

424h

PM2.5 Station

424h · 1 station

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg Hours Stations
2026-06-09 54 37–67 14.1 µg/m³ 16h 1
2026-06-08 59 12–90 16.6 µg/m³ 20h 2
2026-06-07 65 26–89 19.1 µg/m³ 20h 1
2026-06-06 40 10–96 11.2 µg/m³ 22h 2
2026-06-05 31 5–58 7.4 µg/m³ 21h 2
2026-06-04 32 8–73 8.0 µg/m³ 21h 1
2026-06-03 44 7–66 11.3 µg/m³ 23h 1
2026-06-02 60 33–79 16.8 µg/m³ 24h 1
2026-06-01 42 2–82 10.8 µg/m³ 18h 2
2026-05-31 33 8–72 8.2 µg/m³ 21h 1
2026-05-30 28 9–72 7.0 µg/m³ 22h 1
2026-05-29 32 8–52 7.6 µg/m³ 23h 1
2026-05-28 27 4–45 6.4 µg/m³ 21h 1
2026-05-27 25 5–60 6.2 µg/m³ 19h 1
2026-05-26 30 1–56 7.2 µg/m³ 20h 2
2026-05-25 29 5–54 6.9 µg/m³ 22h 1
2026-05-24 39 10–88 9.9 µg/m³ 21h 1
2026-05-23 62 7–171 19.9 µg/m³ 23h 2
2026-05-22 30 6–62 7.3 µg/m³ 21h 2
2026-05-21 47 2–126 13.1 µg/m³ 21h 1
2026-05-20 38 15–50 9.1 µg/m³ 5h 1
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