What is the air quality in Dorchester today?

The current Air Quality Index (AQI) in Dorchester is 22 (Good). PM2.5 concentration is 5.23 µg/m³.

What is the temperature in Dorchester right now?

The current temperature in Dorchester is 19.2°C (feels like 19.2°C). Humidity is 51.1% and wind speed is 24.8 km/h.

Is it safe to go outside in Dorchester?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 2.9 (Moderate).

Air Quality in Dorchester, United States

Drizzle

19.2°C · 51.1% humidity

19.2°

Feels 19.2°

Good

Air quality is satisfactory. Enjoy outdoor activities.

4 stations

Nearby Monitoring Stations

AQI Forecast

25 2pm

22 5pm

23 8pm

24 11pm

27 2am

27 5am

27 8am

24 11am

Air Quality Index Trend

46h · 6 stn

View full history →

Dorchester'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 Dorchester is 1.0× the WHO annual guideline of 5 µg/m³.

51.1%

Humidity

24.8 km/h

Wind W

1019.5 hPa

Pressure

2.9

UV Moderate

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

5.23 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Dorchester?

Temperature & Precipitation

PM2.5 Trend

46h · 6 stations

PM2.55.23 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX2.9

Moderate

Station readings (4 stations within 25 km)

5.23

Median

5.64

Average

4.8

Low

7.0

High

PM2.5 µg/m³ · Model: 6.15 · Bias: +0.9

Both models agree Avg diff: 4.5°C

Where are air quality stations near Dorchester?

Boston Roxbury

3.6 km PM2.5: 8.2 µg/m³

Nubian Square - DEP Station

3.6 km PM2.5: 5.4 µg/m³

Boston

6.9 km PM2.5: 8.2 µg/m³

–

Boston

6.9 km

Milton Blue Hill Observatory

10.1 km PM2.5: 4.1 µg/m³

What cities are near Dorchester?

23 Ashmont 24 Mattapan 21 Roxbury Crossing 22 Jamaica Plain 23 Roslindale 22 South Boston 22 Mission Hill 26 Milton 22 Brookline 21 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 2026-05-28T21:47 UTC.