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Air Quality History for Saint Charles, United States

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

38
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

470h

PM2.5 Station

470h · 4 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 14–50 7.1 µg/m³ 17h 3
2026-05-28 32 22–56 7.7 µg/m³ 24h 4
2026-05-27 33 8–56 8.0 µg/m³ 24h 4
2026-05-26 30 17–58 7.2 µg/m³ 24h 4
2026-05-25 29 12–49 7.0 µg/m³ 24h 4
2026-05-24 35 13–65 8.5 µg/m³ 24h 3
2026-05-23 25 14–38 6.0 µg/m³ 24h 4
2026-05-22 24 9–38 5.6 µg/m³ 24h 3
2026-05-21 26 17–40 6.3 µg/m³ 24h 3
2026-05-20 27 8–40 6.5 µg/m³ 24h 4
2026-05-19 33 19–54 8.1 µg/m³ 24h 3
2026-05-18 43 23–70 10.8 µg/m³ 24h 3
2026-05-17 37 10–54 8.9 µg/m³ 22h 3
2026-05-16 42 24–69 10.5 µg/m³ 21h 4
2026-05-15 34 20–68 8.5 µg/m³ 24h 4
2026-05-14 40 20–153 10.7 µg/m³ 24h 4
2026-05-13 34 20–45 8.3 µg/m³ 23h 4
2026-05-12 32 12–51 7.6 µg/m³ 24h 4
2026-05-11 26 10–42 6.3 µg/m³ 24h 4
2026-05-10 31 4–60 7.6 µg/m³ 23h 4
2026-05-09 35 25–49 8.4 µg/m³ 4h 4
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