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Air Quality History for St. Charles, United States

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

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

Air Quality Index Station

461h

PM2.5 Station

461h · 33 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg Hours Stations
2026-07-22 21 16–27 5.0 µg/m³ 5h 31
2026-07-21 53 28–74 14.5 µg/m³ 24h 29
2026-07-20 68 42–80 20.2 µg/m³ 24h 29
2026-07-19 63 38–91 18.3 µg/m³ 24h 31
2026-07-18 129 58–157 49.5 µg/m³ 24h 30
2026-07-17 168 59–226 99.0 µg/m³ 24h 32
2026-07-16 76 40–145 23.7 µg/m³ 24h 30
2026-07-15 51 42–65 12.7 µg/m³ 24h 31
2026-07-14 40 33–50 9.5 µg/m³ 24h 29
2026-07-13 38 30–50 9.0 µg/m³ 24h 30
2026-07-12 41 31–50 9.9 µg/m³ 24h 29
2026-07-11 42 16–49 10.0 µg/m³ 24h 24
2026-07-10 43 24–63 11.0 µg/m³ 23h 29
2026-07-09 37 26–114 9.5 µg/m³ 24h 30
2026-07-08 38 24–51 9.1 µg/m³ 24h 32
2026-07-07 48 33–55 11.8 µg/m³ 24h 34
2026-07-06 44 20–57 10.7 µg/m³ 14h 29
2026-07-05 99 54–155 34.1 µg/m³ 24h 33
2026-07-04 54 38–66 14.2 µg/m³ 24h 33
2026-07-03 56 52–61 14.4 µg/m³ 24h 36
2026-07-02 56 53–69 14.6 µg/m³ 11h 32
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