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Air Quality History for O'Fallon, United States

Historical PM2.5 and AQI trend from monitoring stations near O'Fallon, United States.

27
Current AQI
Good CAMS model
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

471h

PM2.5 Station

471h · 6 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg Hours Stations
2026-05-29 27 20–40 6.5 µg/m³ 13h 5
2026-05-28 29 12–55 7.0 µg/m³ 24h 5
2026-05-27 33 18–54 8.0 µg/m³ 24h 5
2026-05-26 29 22–46 7.0 µg/m³ 24h 4
2026-05-25 31 18–46 7.5 µg/m³ 24h 5
2026-05-24 30 17–47 7.3 µg/m³ 24h 5
2026-05-23 24 15–38 5.8 µg/m³ 24h 5
2026-05-22 23 12–30 5.6 µg/m³ 24h 5
2026-05-21 25 8–33 6.0 µg/m³ 24h 5
2026-05-20 26 14–38 6.2 µg/m³ 24h 5
2026-05-19 30 5–43 7.2 µg/m³ 24h 5
2026-05-18 41 24–57 9.9 µg/m³ 24h 5
2026-05-17 33 15–51 7.9 µg/m³ 22h 5
2026-05-16 42 24–64 10.4 µg/m³ 22h 5
2026-05-15 41 20–62 10.0 µg/m³ 24h 4
2026-05-14 35 20–66 8.9 µg/m³ 24h 5
2026-05-13 33 16–53 7.9 µg/m³ 24h 5
2026-05-12 31 17–44 7.5 µg/m³ 24h 5
2026-05-11 27 16–44 6.5 µg/m³ 24h 5
2026-05-10 28 7–40 6.6 µg/m³ 23h 5
2026-05-09 31 19–37 7.4 µg/m³ 7h 5
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