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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.

16
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

333h

PM2.5 Station

333h · 31 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg Hours Stations
2026-07-22 20 16–26 4.9 µg/m³ 5h 29
2026-07-21 53 28–75 14.7 µg/m³ 24h 28
2026-07-20 69 51–80 20.6 µg/m³ 24h 28
2026-07-19 63 38–91 18.4 µg/m³ 24h 30
2026-07-18 129 58–158 50.3 µg/m³ 24h 29
2026-07-17 169 59–226 100.5 µg/m³ 24h 31
2026-07-16 77 42–149 24.2 µg/m³ 24h 29
2026-07-15 51 42–66 12.9 µg/m³ 24h 30
2026-07-14 40 32–51 9.6 µg/m³ 24h 28
2026-07-13 37 30–51 9.0 µg/m³ 24h 29
2026-07-12 42 31–50 10.0 µg/m³ 24h 28
2026-07-11 42 16–51 10.1 µg/m³ 24h 23
2026-07-10 43 23–63 11.1 µg/m³ 23h 28
2026-07-09 38 25–117 9.6 µg/m³ 24h 29
2026-07-08 35 24–46 8.4 µg/m³ 17h 31
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