Air Quality in San Mateo, United States
Windy
15.8°C · 53.2% humidity
15.8°
Feels 15.8°
40
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast
Nearby Monitoring Stations
San Mateo's air quality — share it
AQI Forecast
Calibrated
15
3pm
15
15
40
6pm
33
28
24
9pm
22
20
18
12am
17
17
16
3am
16
16
15
6am
0
0
0
9am
0
15
15
12pm
15
0
Station readings
10
23
CAMS model
adj -39
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
34
34
34
34
54
54
54
34
Air Quality Index Trend
42h · 1 stnSan Mateo's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
53.2%
Humidity
80.7 km/h
Wind W
1017.3 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
9.65 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for San Mateo?
Temperature & Precipitation
PM2.5 Trend
42h · 1 stationPM2.59.65 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX4.4
Moderate
What is the 7-day forecast for San Mateo?
06-09
16.4° 9.5°
06-10
22.5° 10.8°
06-11
25.1° 14.4°
06-12
22.5° 11.2°
06-13
19.2° 10.5°
06-14
21.9° 11.0°
06-15
20.3° 10.7°
Both models agree
Avg diff: 4.1°C
Where are air quality stations near San Mateo?
17
Belle Air School
18
Parkside Intermediate School
28
Parkside Intermediate School (redeployment)
18
Brentwood Park
19
California and Cypress Ave
43
Rise South City Office
25
Cypress and Pine Playlot
17
Rollingwood Elementary
18
California and Hawthorn Pl
15
Emerald Hills
What cities are near San Mateo?
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-06-09T01:05 UTC.