Air Quality in Belmont, United States

Windy
25.5°C · 36.1% humidity
25.5°
Feels 25.5°
24
Good
Air quality is satisfactory. Enjoy outdoor activities.
22 stations

Nearby Monitoring Stations

AQI Forecast
27 1pm
27
27
24 4pm
27
29
30 7pm
31
32
33 10pm
33
33
34 1am
34
34
34 4am
34
27
27 7am
27
27
27 10am
27
27
AD 728×90

Air Quality Index Trend

47h · 1 stn

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

36.1%
Humidity
49.0 km/h
Wind WNW
1007.2 hPa
Pressure
10.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
24
5.72 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Belmont?

Temperature & Precipitation

PM2.5 Trend

47h · 1 station
PM2.55.72 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX10.9
Extreme
AD 300×250
Station readings (22 stations within 25 km)
5.72
Median
5.78
Average
4.6
Low
8.34
High
PM2.5 µg/m³ · Model: 7.35 · Bias: +1.6

What is the 7-day forecast for Belmont?

07-21
25.0° 11.5°
07-22
25.5° 14.2°
07-23
22.5° 16.4°
07-24
29.3° 12.6°
07-25
22.5° 14.3°
07-26
27.7° 11.8°
07-27
25.0° 12.1°
Both models agree Avg diff: 2.6°C

Where are air quality stations near Belmont?

24
Emerald Hills
7.3 km PM2.5: 5.8 µg/m³
70
Redwood City, San Mateo, California
7.6 km PM2.5: 21.1 µg/m³
47
Redwood City, San Mateo, California
7.6 km PM2.5: 11.3 µg/m³
23
Berkeley-Palo Alto
13.5 km PM2.5: 5.4 µg/m³
19
Belle Air School
16.2 km PM2.5: 4.6 µg/m³
26
Garden Ave Residence
16.3 km PM2.5: 6.3 µg/m³
19
Parkside Intermediate School
16.5 km PM2.5: 4.6 µg/m³
28
Parkside Intermediate School (redeployment)
16.5 km PM2.5: 6.6 µg/m³
20
San Bruno School District Office
16.7 km PM2.5: 4.7 µg/m³
28
Pacific Ave Residence
18.1 km PM2.5: 6.6 µg/m³

What cities are near Belmont?

24 San Carlos 25 Foster City 24 Redwood City 24 San Mateo 24 Burlingame 23 Menlo Park 23 Millbrae 23 East Palo Alto 23 Palo Alto 23 San Bruno
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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 2026-07-21T23:27 UTC.