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Air Quality History for McHenry, United States

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

33
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

333h

PM2.5 Station

333h · 83 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg PM10 avg Hours Stations
2026-10-21 54 53–56 13.8 µg/m³ 7.5 2h 84
2026-10-20 49 22–66 12.6 µg/m³ 1.1 24h 74
2026-10-19 29 22–45 7.0 µg/m³ 3.4 24h 83
2026-10-18 24 18–38 5.8 µg/m³ — 24h 77
2026-10-17 16 13–24 3.8 µg/m³ 4.5 24h 83
2026-10-16 18 11–51 4.4 µg/m³ 1.1 24h 79
2026-10-15 24 14–39 5.7 µg/m³ 1.6 24h 83
2026-10-14 37 18–52 8.9 µg/m³ 1.8 24h 84
2026-10-13 34 25–46 8.2 µg/m³ 3.9 24h 84
2026-10-12 43 32–55 10.4 µg/m³ 3.5 24h 85
2026-10-11 32 29–37 7.6 µg/m³ 15.3 24h 84
2026-10-10 30 24–50 7.2 µg/m³ 54.2 24h 71
2026-10-09 34 25–45 8.2 µg/m³ 2.1 24h 73
2026-10-08 23 18–33 5.5 µg/m³ — 24h 80
2026-10-07 26 22–29 6.3 µg/m³ 3.2 19h 75
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