Air Quality History for San Mateo, United States
Historical PM2.5 and AQI trend from monitoring stations near San Mateo, United States.
9
Current AQI
Good Station
Good Station
Air Quality Index Station
393hPM2.5 Station
393h · 1 stationTemperature GFS model
80ptPrecipitation GFS model
mm/dayDaily Summary Station
| Date | AQI | Range | PM2.5 avg | PM10 avg | Hours | Stations |
|---|---|---|---|---|---|---|
| 2026-06-09 | 12 | 2–23 | 2.9 µg/m³ | 4.0 | 11h | 1 |
| 2026-06-08 | 9 | 1–18 | 2.0 µg/m³ | 3.7 | 19h | 1 |
| 2026-06-07 | 9 | 2–19 | 2.1 µg/m³ | 4.1 | 24h | 1 |
| 2026-06-06 | 18 | 4–54 | 4.3 µg/m³ | 6.8 | 24h | 1 |
| 2026-06-05 | 26 | 8–42 | 6.2 µg/m³ | 11.3 | 24h | 1 |
| 2026-06-04 | 14 | 2–25 | 3.4 µg/m³ | 5.5 | 24h | 1 |
| 2026-06-03 | 12 | 1–25 | 3.0 µg/m³ | 4.1 | 24h | 1 |
| 2026-06-02 | 23 | 10–36 | 5.4 µg/m³ | 8.2 | 24h | 1 |
| 2026-06-01 | 30 | 17–45 | 7.1 µg/m³ | 11.3 | 21h | 1 |
| 2026-05-31 | 24 | 9–62 | 5.8 µg/m³ | 8.9 | 24h | 1 |
| 2026-05-30 | 12 | 2–26 | 2.8 µg/m³ | 4.1 | 20h | 1 |
| 2026-05-29 | 11 | 3–23 | 2.6 µg/m³ | 4.2 | 16h | 1 |
| 2026-05-28 | 10 | 3–15 | 2.3 µg/m³ | 3.7 | 13h | 1 |
| 2026-05-27 | 7 | 1–30 | 1.7 µg/m³ | 3.2 | 24h | 1 |
| 2026-05-26 | 13 | 1–27 | 2.8 µg/m³ | 3.8 | 14h | 1 |
| 2026-05-25 | 4 | 1–8 | 0.8 µg/m³ | 1.8 | 9h | 1 |
| 2026-05-24 | 4 | 1–9 | 0.8 µg/m³ | 1.4 | 5h | 1 |
| 2026-05-23 | 7 | 1–19 | 1.8 µg/m³ | 2.9 | 21h | 1 |
| 2026-05-22 | 11 | 2–39 | 2.7 µg/m³ | 4.1 | 18h | 1 |
| 2026-05-21 | 33 | 14–50 | 7.8 µg/m³ | 13.0 | 24h | 1 |
| 2026-05-20 | 22 | 11–39 | 5.3 µg/m³ | 8.1 | 10h | 1 |