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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.

40
Current AQI
Good Station
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 30 20–57 7.3 µg/m³ 16h 7
2026-05-28 29 20–45 6.9 µg/m³ 24h 6
2026-05-27 31 14–51 7.4 µg/m³ 24h 7
2026-05-26 30 18–52 7.1 µg/m³ 24h 6
2026-05-25 29 19–44 6.9 µg/m³ 24h 6
2026-05-24 31 17–62 7.5 µg/m³ 24h 6
2026-05-23 24 15–35 5.8 µg/m³ 24h 6
2026-05-22 24 16–37 5.7 µg/m³ 24h 7
2026-05-21 26 17–64 6.3 µg/m³ 24h 6
2026-05-20 29 18–42 7.1 µg/m³ 24h 7
2026-05-19 35 20–53 8.3 µg/m³ 24h 7
2026-05-18 41 25–55 10.0 µg/m³ 24h 6
2026-05-17 39 28–52 9.4 µg/m³ 22h 7
2026-05-16 40 27–52 9.7 µg/m³ 21h 7
2026-05-15 35 23–58 8.4 µg/m³ 24h 6
2026-05-14 36 21–70 8.8 µg/m³ 24h 7
2026-05-13 33 22–51 7.9 µg/m³ 24h 7
2026-05-12 31 21–51 7.4 µg/m³ 24h 7
2026-05-11 28 12–38 6.6 µg/m³ 24h 6
2026-05-10 29 4–46 7.1 µg/m³ 24h 6
2026-05-09 35 30–42 8.4 µg/m³ 4h 6
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