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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.

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

Air Quality Index Station

333h

PM2.5 Station

333h · 18 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg Hours Stations
2026-10-21 23 23–23 5.6 µg/m³ 1h 18
2026-10-20 22 10–32 5.3 µg/m³ 24h 17
2026-10-19 25 18–32 6.0 µg/m³ 24h 20
2026-10-18 17 14–21 4.1 µg/m³ 24h 17
2026-10-17 15 11–25 3.7 µg/m³ 24h 18
2026-10-16 29 15–51 7.0 µg/m³ 24h 18
2026-10-15 29 17–54 7.0 µg/m³ 24h 20
2026-10-14 41 34–50 9.8 µg/m³ 24h 18
2026-10-13 26 18–39 6.2 µg/m³ 24h 18
2026-10-12 14 10–24 3.4 µg/m³ 24h 19
2026-10-11 16 10–23 3.9 µg/m³ 24h 20
2026-10-10 33 20–40 7.8 µg/m³ 24h 18
2026-10-09 25 18–35 6.1 µg/m³ 24h 20
2026-10-08 25 18–34 6.1 µg/m³ 24h 22
2026-10-07 24 20–27 5.7 µg/m³ 20h 19
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