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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.

31
Current AQI
Good CAMS model
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

333h

PM2.5 Station

333h · 1 station

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 39 34–43 9.4 µg/m³ 14.5 7h 4
2026-06-08 50 20–67 12.5 µg/m³ 22.2 24h 5
2026-06-07 51 24–64 13.0 µg/m³ 23.3 24h 5
2026-06-06 26 9–39 6.2 µg/m³ 10.9 23h 5
2026-06-05 24 7–51 5.7 µg/m³ 7.6 24h 6
2026-06-04 26 13–47 6.3 µg/m³ 10.8 24h 5
2026-06-03 32 17–60 7.8 µg/m³ 11.4 24h 6
2026-06-02 48 22–69 12.5 µg/m³ 19.6 24h 7
2026-06-01 29 17–40 7.1 µg/m³ 12.0 22h 6
2026-05-31 24 11–53 5.7 µg/m³ 9.3 24h 6
2026-05-30 23 10–46 5.6 µg/m³ 9.3 24h 5
2026-05-29 31 19–45 7.5 µg/m³ 14.6 24h 6
2026-05-28 24 11–51 5.8 µg/m³ 8.6 24h 6
2026-05-27 18 5–35 4.2 µg/m³ 8.2 24h 5
2026-05-26 27 23–42 6.5 µg/m³ 11.9 17h 7
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