Air Quality in Belmont, United States

Windy
18.7°C · 56.4% humidity
18.7°
Feels 18.7°
31
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast

Nearby Monitoring Stations

AQI Forecast
34 2pm
34
34
31 5pm
54
54
54 8pm
54
54
54 11pm
54
54
54 2am
54
34
34 5am
27
27
27 8am
27
27
27 11am
27
27
AD 728×90

Air Quality Index Trend

46h · 3 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. Current PM2.5 concentration in Belmont is 1.5× the WHO annual guideline of 5 µg/m³.

56.4%
Humidity
61.6 km/h
Wind WNW
1017.9 hPa
Pressure
6.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
31
7.35 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Belmont?

Temperature & Precipitation

PM2.5 Trend

46h · 3 stations
PM2.57.35 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX6.9
High
AD 300×250

What is the 7-day forecast for Belmont?

05-29
18.7° 10.5°
05-30
16.0° 12.4°
05-31
21.7° 14.7°
06-01
21.0° 11.0°
06-02
18.6° 10.3°
06-03
22.2° 8.9°
06-04
21.3° 9.9°
Both models agree Avg diff: 2.9°C

Where are air quality stations near Belmont?

13
Emerald Hills
7.3 km PM2.5: 3.2 µg/m³
52
Redwood City, San Mateo, California
7.6 km PM2.5: 12.6 µg/m³
24
Redwood City, San Mateo, California
7.6 km PM2.5: 5.8 µg/m³
12
Berkeley-Palo Alto
13.5 km PM2.5: 2.8 µg/m³
25
Belle Air School
16.2 km PM2.5: 5.9 µg/m³
16
Parkside Intermediate School
16.5 km PM2.5: 3.8 µg/m³
28
Parkside Intermediate School (redeployment)
16.5 km PM2.5: 6.6 µg/m³
15
Acterra!
18.1 km PM2.5: 3.6 µg/m³
13
Brentwood Park
19.0 km PM2.5: 3.2 µg/m³
15
California and Cypress Ave
19.2 km PM2.5: 3.7 µg/m³

What cities are near Belmont?

31 San Carlos 43 Foster City 31 Redwood City 43 San Mateo 22 Burlingame 27 Menlo Park 20 Millbrae 27 East Palo Alto 27 Palo Alto 24 San Bruno
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-29T00:22 UTC.