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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.

30
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

456h

PM2.5 Station

456h · 7 stations

Temperature GFS model

79pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg Hours Stations
2026-07-21 60 31–96 17.5 µg/m³ 24h 97
2026-07-20 98 55–106 34.0 µg/m³ 24h 98
2026-07-19 109 60–160 39.9 µg/m³ 24h 103
2026-07-18 51 32–88 13.2 µg/m³ 24h 102
2026-07-17 225 67–344 170.2 µg/m³ 24h 108
2026-07-16 152 49–320 98.1 µg/m³ 24h 99
2026-07-15 52 40–59 12.6 µg/m³ 24h 102
2026-07-14 58 27–66 15.9 µg/m³ 24h 99
2026-07-13 61 38–65 16.9 µg/m³ 24h 101
2026-07-12 50 33–56 12.4 µg/m³ 24h 96
2026-07-11 37 26–46 8.8 µg/m³ 24h 80
2026-07-10 35 27–49 8.3 µg/m³ 24h 97
2026-07-09 50 31–53 12.1 µg/m³ 24h 103
2026-07-08 55 47–62 14.2 µg/m³ 24h 107
2026-07-07 43 36–51 10.3 µg/m³ 24h 106
2026-07-06 42 29–59 10.4 µg/m³ 13h 98
2026-07-05 85 57–171 30.7 µg/m³ 24h 106
2026-07-04 43 31–55 10.3 µg/m³ 24h 106
2026-07-03 35 24–50 8.3 µg/m³ 24h 105
2026-07-02 44 38–57 10.6 µg/m³ 11h 96
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