Air Quality in Belmont, United States

Drizzle
19.2°C · 51.1% humidity
19.2°
Feels 19.2°
31
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations

Nearby Monitoring Stations

AQI Forecast
27 5pm
25
25
31 8pm
29
28
27 11pm
29
28
28 2am
28
27
27 5am
34
27
27 8am
24
24
24 11am
24
24
25 2pm
25
25
AD 728×90

Air Quality Index Trend

45h · 2 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.

51.1%
Humidity
24.8 km/h
Wind W
1019.5 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
31
7.36 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Belmont?

Temperature & Precipitation

PM2.5 Trend

45h · 2 stations
PM2.57.36 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (2 stations within 25 km)
7.36
Median
7.2
Average
6.2
Low
8.2
High
PM2.5 µg/m³ · Model: 5.9 · Bias: -1.5

What is the 7-day forecast for Belmont?

05-29
19.2° 11.2°
0.13 mm
05-30
24.5° 9.2°
8.56 mm
05-31
25.5° 10.0°
0.5 mm
06-01
22.7° 8.1°
06-02
20.9° 12.2°
0.44 mm
06-03
27.3° 14.7°
06-04
22.8° 17.5°
0.13 mm
Both models agree Avg diff: 4.5°C

Where are air quality stations near Belmont?

19
Boston
10.6 km PM2.5: 4.6 µg/m³
40
Boston
10.6 km PM2.5: 9.6 µg/m³
22
Nubian Square - DEP Station
10.8 km PM2.5: 5.3 µg/m³
34
Boston Roxbury
10.8 km PM2.5: 8.2 µg/m³
14
Milton Blue Hill Observatory
21.2 km PM2.5: 3.4 µg/m³

What cities are near Belmont?

31 Watertown 30 Waltham 31 Brighton 31 Allston 31 Cambridge 30 Medford 31 Somerville 31 Chestnut Hill 32 Brookline 32 Fenway/Kenmore
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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 2026-05-29T00:12 UTC.