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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

335h

PM2.5 Station

335h · 4 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg PM10 avg Hours Stations
2026-06-09 19 17–25 4.6 µg/m³ 1.0 9h 93
2026-06-08 44 31–55 10.7 µg/m³ 3.9 24h 105
2026-06-07 28 22–36 6.7 µg/m³ 2.2 24h 105
2026-06-06 42 26–53 10.0 µg/m³ — 24h 100
2026-06-05 51 42–55 12.5 µg/m³ 1.2 24h 104
2026-06-04 38 28–48 9.2 µg/m³ 4.0 24h 106
2026-06-03 28 23–34 6.7 µg/m³ 1.8 24h 106
2026-06-02 23 21–25 5.6 µg/m³ 1.1 24h 107
2026-06-01 26 20–39 6.2 µg/m³ — 24h 94
2026-05-31 24 21–29 5.8 µg/m³ 1.0 24h 106
2026-05-30 41 20–69 10.8 µg/m³ 8.6 24h 106
2026-05-29 26 19–32 6.2 µg/m³ 1.4 24h 105
2026-05-28 27 22–37 6.5 µg/m³ 2.3 24h 98
2026-05-27 44 26–63 11.1 µg/m³ 10.2 24h 106
2026-05-26 29 26–35 6.9 µg/m³ 2.5 14h 106
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