Air Quality in San Mateo, United States

Partly Cloudy
22.8°C · 67.8% humidity
22.8°
Feels 22.8°
26
Good
Air quality is satisfactory. Enjoy outdoor activities.
37 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
10 5am
10
10
26 8am
21
18
16 11am
14
13
12 2pm
12
4
4 5pm
11
10
10 8pm
10
10
10 11pm
10
10
10 2am
10
10
Station readings
8
10
15
CAMS model adj -24
34
34
34
34
34
34
34
34
34
34
34
27
27
34
34
34
34
34
34
34
34
34
34
34
AD 728×90

Air Quality Index Trend

42h · 1 stn

San 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.

67.8%
Humidity
10.2 km/h
Wind NNW
1016.6 hPa
Pressure
1.4
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
26
6.21 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for San Mateo?

Temperature & Precipitation

PM2.5 Trend

42h · 1 station
PM2.56.21 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX1.4
Low
AD 300×250
Station readings (37 stations within 25 km)
6.21
Median
6.19
Average
2.98
Low
12.0
High
PM2.5 µg/m³ · Model: 7.1 · Bias: +0.9

What is the 7-day forecast for San Mateo?

09-05
25.7° 13.0°
09-06
26.7° 14.7°
09-07
28.3° 11.0°
09-08
27.4° 12.3°
09-09
24.8° 15.3°
09-10
24.4° 13.4°
09-11
21.2° 14.6°
0.13 mm
Both models agree Avg diff: 3.3°C

Where are air quality stations near San Mateo?

23
Belle Air School
9.8 km PM2.5: 5.6 µg/m³
26
Garden Ave Residence
9.8 km PM2.5: 6.3 µg/m³
26
Parkside Intermediate School
10.1 km PM2.5: 6.3 µg/m³
24
San Bruno School District Office
10.4 km PM2.5: 5.8 µg/m³
26
Pacific Ave Residence
11.6 km PM2.5: 6.3 µg/m³
20
Brentwood Park
12.6 km PM2.5: 4.9 µg/m³
23
California and Cypress Ave
12.8 km PM2.5: 5.4 µg/m³
29
Rise South City Office
12.8 km PM2.5: 6.9 µg/m³
37
Cypress and Pine Playlot
12.8 km PM2.5: 8.9 µg/m³
22
Rollingwood Elementary
12.9 km PM2.5: 5.2 µg/m³

What cities are near San Mateo?

25 Burlingame 27 Foster City 28 Belmont 25 Millbrae 30 San Carlos 25 San Bruno 36 Redwood City 28 South San Francisco 24 Pacifica 26 Menlo Park
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-09-05T15:10 UTC.