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Air Quality History for San Marcos, United States

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

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

Air Quality Index Station

334h

PM2.5 Station

334h · 2 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg PM10 avg Hours Stations
2026-08-08 29 19–66 7.4 µg/m³ 13.0 7h 5
2026-08-07 27 18–36 6.5 µg/m³ 12.5 24h 6
2026-08-06 44 18–71 11.2 µg/m³ 15.6 24h 7
2026-08-05 67 46–104 19.9 µg/m³ 29.6 24h 6
2026-08-04 64 37–88 18.6 µg/m³ 35.3 24h 7
2026-08-03 47 28–69 12.1 µg/m³ 22.4 24h 6
2026-08-02 45 37–61 10.9 µg/m³ 17.9 24h 6
2026-08-01 30 17–56 7.3 µg/m³ 10.8 24h 6
2026-07-31 41 20–56 10.0 µg/m³ 15.5 24h 6
2026-07-30 44 26–60 10.9 µg/m³ 19.4 24h 6
2026-07-29 53 35–118 13.9 µg/m³ 23.9 24h 6
2026-07-28 35 22–48 8.3 µg/m³ 15.7 24h 6
2026-07-27 35 19–56 8.5 µg/m³ 14.8 24h 6
2026-07-26 43 23–64 10.6 µg/m³ 21.3 24h 6
2026-07-25 58 45–64 15.5 µg/m³ 32.5 15h 7
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