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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.

34
Current AQI
Good CAMS model
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

477h

PM2.5 Station

477h · 1 station

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg PM10 avg Hours Stations
2026-06-09 38 31–48 9.1 µg/m³ 14.9 9h 4
2026-06-08 50 28–71 12.7 µg/m³ 22.2 24h 5
2026-06-07 52 35–64 13.5 µg/m³ 23.3 24h 5
2026-06-06 27 15–45 6.4 µg/m³ 10.9 22h 5
2026-06-05 24 10–42 5.7 µg/m³ 7.6 24h 5
2026-06-04 25 8–39 6.0 µg/m³ 10.8 24h 5
2026-06-03 32 18–52 7.7 µg/m³ 11.4 24h 6
2026-06-02 48 27–64 12.2 µg/m³ 19.6 24h 7
2026-06-01 27 11–36 6.5 µg/m³ 12.0 23h 5
2026-05-31 23 11–36 5.6 µg/m³ 9.3 24h 6
2026-05-30 22 10–41 5.2 µg/m³ 9.3 24h 5
2026-05-29 30 20–48 7.3 µg/m³ 14.6 24h 5
2026-05-28 20 13–30 4.9 µg/m³ 8.6 24h 5
2026-05-27 24 11–72 5.9 µg/m³ 8.2 24h 5
2026-05-26 30 21–43 7.1 µg/m³ 11.8 24h 7
2026-05-25 29 18–41 6.9 µg/m³ 10.0 24h 6
2026-05-24 25 16–42 5.9 µg/m³ 6.1 24h 6
2026-05-23 21 5–34 5.1 µg/m³ 6.2 24h 6
2026-05-22 25 10–76 6.2 µg/m³ 7.1 24h 6
2026-05-21 29 10–48 7.0 µg/m³ 10.3 24h 6
2026-05-20 18 8–39 4.3 µg/m³ 4.5 15h 6
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