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Air Quality History for Johnston, United States

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

57
Current AQI
Moderate Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

283h

PM2.5 Station

283h · 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 57 57–57 14.9 µg/m³ 1h 1
2026-07-21 47 13–72 12.4 µg/m³ 16h 1
2026-07-20 76 25–154 24.7 µg/m³ 15h 1
2026-07-19 57 16–157 18.0 µg/m³ 14h 1
2026-07-18 40 1–168 13.7 µg/m³ 14h 1
2026-07-17 64 21–200 23.9 µg/m³ 15h 1
2026-07-16 36 17–63 8.8 µg/m³ 14h 1
2026-07-15 45 25–79 11.8 µg/m³ 12h 1
2026-07-14 40 9–73 10.4 µg/m³ 13h 1
2026-07-13 42 17–72 11.0 µg/m³ 10h 1
2026-07-12 37 13–59 9.1 µg/m³ 11h 2
2026-07-11 43 21–62 10.8 µg/m³ 16h 1
2026-07-10 31 17–55 7.6 µg/m³ 12h 1
2026-07-09 48 20–107 13.1 µg/m³ 16h 1
2026-07-08 46 17–113 12.7 µg/m³ 19h 2
2026-07-07 49 24–89 13.1 µg/m³ 14h 2
2026-07-06 48 15–72 13.0 µg/m³ 10h 1
2026-07-05 57 21–234 21.4 µg/m³ 21h 2
2026-07-04 49 16–88 13.8 µg/m³ 15h 1
2026-07-03 50 8–108 14.2 µg/m³ 20h 1
2026-07-02 62 44–90 17.7 µg/m³ 5h 2
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