Air Quality in Millbrae, United States

Windy
17.8°C · 68.3% humidity
17.8°
Feels 17.8°
18
Good
Air quality is satisfactory. Enjoy outdoor activities.
51 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
8 3pm
15
15
18 6pm
15
15
15 9pm
15
15
15 12am
15
15
15 3am
15
15
8 6am
8
8
8 9am
8
8
8 12pm
8
8
Station readings
11
5
5
CAMS model adj -19
27
34
34
34
34
34
34
34
34
34
34
34
34
34
34
27
27
27
27
27
27
27
27
27
AD 728×90

Air Quality Index Trend

42h · 1 stn

Millbrae's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

68.3%
Humidity
69.2 km/h
Wind WSW
1007.6 hPa
Pressure
2.2
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
18
4.37 µg/m³
PM10▲
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Millbrae?

Temperature & Precipitation

PM2.5 Trend

42h · 1 station
PM2.54.37 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX2.2
Moderate
AD 300×250
Station readings (51 stations within 25 km)
4.37
Median
5.45
Average
1.08
Low
11.5
High
PM2.5 µg/m³ · Model: 7.35 · Bias: +3.0

What is the 7-day forecast for Millbrae?

07-22
17.8° 14.3°
07-23
17.5° 16.8°
0.06 mm
07-24
19.4° 13.8°
07-25
16.2° 14.6°
07-26
19.0° 13.5°
0.06 mm
07-27
18.5° 14.0°
07-28
18.0° 13.8°
0.31 mm
Both models agree Avg diff: 2.4°C

Where are air quality stations near Millbrae?

19
Garden Ave Residence
3.2 km PM2.5: 4.5 µg/m³
15
Belle Air School
3.3 km PM2.5: 3.6 µg/m³
15
Parkside Intermediate School
3.4 km PM2.5: 3.5 µg/m³
28
Parkside Intermediate School (redeployment)
3.4 km PM2.5: 6.6 µg/m³
15
San Bruno School District Office
3.6 km PM2.5: 3.6 µg/m³
23
Pacific Ave Residence
5.2 km PM2.5: 5.5 µg/m³
18
Brentwood Park
5.9 km PM2.5: 4.2 µg/m³
16
Rollingwood Elementary
6.1 km PM2.5: 3.9 µg/m³
17
Portola Elementary
6.5 km PM2.5: 4.0 µg/m³
26
Rise South City Office
6.7 km PM2.5: 6.3 µg/m³

What cities are near Millbrae?

19 Burlingame 18 San Bruno 21 South San Francisco 21 San Mateo 18 Pacifica 22 Foster City 23 Belmont 23 Visitacion Valley 21 Daly City 23 Bayview-Hunters Point
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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 2026-07-22T01:42 UTC.