Air Quality in Dorchester, United States
Drizzle
18.8°C · 91.7% humidity
18.8°
Feels 18.8°
56
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
2 stations
Nearby Monitoring Stations
Dorchester's air quality — share it
AQI Forecast
Calibrated
72
10am
72
52
56
1pm
52
52
52
4pm
52
52
52
7pm
52
52
45
10pm
45
43
43
1am
42
42
42
4am
42
42
42
7am
42
42
Station readings
85
68
60
CAMS model
adj +18
54
54
34
34
34
34
34
34
34
34
34
34
27
27
25
25
24
24
24
24
24
24
24
24
Air Quality Index Trend
47h · 1 stnDorchester's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
91.7%
Humidity
61.5 km/h
Wind NE
1014.1 hPa
Pressure
19.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
14.51 µg/m³
PM10
34.3 µg/m³
050100150200300500
What is the weather forecast for Dorchester?
Temperature & Precipitation
PM2.5 Trend
47h · 1 stationPM2.514.51 µg/m³
✓ WHO
Moderate
PM1034.3 µg/m³
Good
UV INDEX19.9
Extreme
Station readings (2 stations within 25 km)
14.51
Median
17.16
Average
12.77
Low
21.55
High
PM2.5 µg/m³ · Model: 13.7 · Bias: -0.8
What is the 7-day forecast for Dorchester?
07-21
27.2° 18.8°
4.19 mm
07-22
22.7° 14.9°
9.25 mm
07-23
27.7° 16.7°
1.81 mm
07-24
26.5° 14.9°
2.31 mm
07-25
35.5° 20.6°
2.88 mm
07-26
23.5° 17.0°
1.63 mm
07-27
28.8° 14.9°
5.94 mm
Both models agree
Avg diff: 3.6°C
Where are air quality stations near Dorchester?
9
Boston Roxbury
52
Nubian Square - DEP Station
14
Boston
37
Boston
60
Magazine Beach Park
38
Milton Blue Hill Observatory
What cities are near Dorchester?
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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 2026-07-21T17:15 UTC.