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Air Quality History for Palo Alto, United States

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

19
Current AQI
Good Station
48 Hours 7 Days 14 Days 20 Days
CSV JSON

Air Quality Index Station

477h

PM2.5 Station

477h · 109 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date AQI Range PM2.5 avg PM10 avg Hours Stations
2026-10-21 31 28–34 7.6 µg/m³ 1.7 3h 106
2026-10-20 19 16–32 4.6 µg/m³ 5.4 24h 93
2026-10-19 23 20–29 5.5 µg/m³ 11.7 24h 106
2026-10-18 34 24–41 8.0 µg/m³ 20.3 24h 98
2026-10-17 30 24–35 7.1 µg/m³ 12.8 24h 109
2026-10-16 30 23–36 7.3 µg/m³ 12.3 24h 104
2026-10-15 28 25–34 6.8 µg/m³ 12.3 24h 111
2026-10-14 24 19–29 5.8 µg/m³ 11.2 24h 112
2026-10-13 24 18–30 5.9 µg/m³ 12.1 24h 111
2026-10-12 25 23–28 6.0 µg/m³ 10.5 24h 112
2026-10-11 28 25–31 6.7 µg/m³ 14.5 24h 112
2026-10-10 30 23–52 7.1 µg/m³ 14.3 24h 99
2026-10-09 38 30–62 9.1 µg/m³ 19.9 24h 104
2026-10-08 29 25–36 6.9 µg/m³ 11.5 24h 112
2026-10-07 26 23–36 6.3 µg/m³ 12.7 24h 108
2026-10-06 31 29–38 7.5 µg/m³ 13.2 24h 108
2026-10-05 31 28–35 7.4 µg/m³ 8.5 24h 113
2026-10-04 35 18–41 8.4 µg/m³ 4.2 24h 103
2026-10-03 37 29–50 8.8 µg/m³ 7.6 24h 109
2026-10-02 36 25–53 8.8 µg/m³ 6.9 24h 112
2026-10-01 26 20–36 6.3 µg/m³ 2.2 18h 112
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