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Air Quality History for Redwood City, United States

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

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

Air Quality Index Station

333h

PM2.5 Station

333h · 106 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 36 36–36 8.6 µg/m³ — 1h 106
2026-10-20 22 16–58 5.4 µg/m³ 5.4 24h 92
2026-10-19 23 20–28 5.5 µg/m³ 11.7 24h 105
2026-10-18 34 22–41 8.2 µg/m³ 20.3 24h 96
2026-10-17 30 24–35 7.2 µg/m³ 12.8 24h 107
2026-10-16 31 23–40 7.5 µg/m³ 12.3 24h 102
2026-10-15 28 25–35 6.8 µg/m³ 12.3 24h 110
2026-10-14 24 19–34 5.9 µg/m³ 11.2 24h 110
2026-10-13 25 18–30 5.9 µg/m³ 12.1 24h 110
2026-10-12 25 23–28 6.1 µg/m³ 10.5 24h 111
2026-10-11 28 25–31 6.7 µg/m³ 14.5 24h 110
2026-10-10 30 23–50 7.2 µg/m³ 14.3 24h 99
2026-10-09 37 30–56 8.9 µg/m³ 19.9 24h 102
2026-10-08 29 25–36 7.0 µg/m³ 11.5 24h 111
2026-10-07 26 22–30 6.2 µg/m³ 12.8 20h 106
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