Air Quality in Somerville, United States
Windy
27.1°C · 30.1% humidity
27.1°
Feels 27.1°
42
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast
Nearby Monitoring Stations
Somerville's air quality — share it
AQI Forecast
Calibrated
48
4pm
48
50
42
7pm
44
46
47
10pm
48
48
49
1am
49
49
50
4am
50
50
57
7am
57
50
50
10am
50
50
50
1pm
50
50
Station readings
17h ago
AQI 74
PM2.5 22.8 µg/m³ · 17h ago
CAMS model
adj +23
25
25
27
27
27
27
27
27
27
27
27
27
27
27
27
34
34
27
27
27
27
27
27
27
Air Quality Index Trend
4h · 1 stnSomerville's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
30.1%
Humidity
53.2 km/h
Wind W
1009.1 hPa
Pressure
2.2
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
10.0 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Somerville?
Temperature & Precipitation
PM2.5 Trend
4h · 1 stationPM2.510.0 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX2.2
Moderate
What is the 7-day forecast for Somerville?
08-03
27.1° 17.5°
0.44 mm
08-04
37.6° 18.1°
08-05
33.7° 22.7°
08-06
28.8° 17.0°
1.44 mm
08-07
32.1° 21.0°
4.63 mm
08-08
28.5° 19.4°
0.06 mm
08-09
40.6° 23.1°
Both models agree
Avg diff: 4.2°C
Where are air quality stations near Somerville?
74
Magazine Beach Park
36
Boston
53
Nubian Square - DEP Station
36
Boston Roxbury
53
Boston Roxbury
30
Lynn Water Treatment Plant
26
Lynn Water Treatment Plant
What cities are near Somerville?
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-07T23:56 UTC.