What is the air quality in Chelsea today?

The current Air Quality Index (AQI) in Chelsea is 15 (Good). PM2.5 concentration is 3.57 µg/m³.

What is the temperature in Chelsea right now?

The current temperature in Chelsea is 6.6°C (feels like 3.3°C). Humidity is 59.8% and wind speed is 18.1 km/h.

Is it safe to go outside in Chelsea?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Chelsea, United States

Partly Cloudy

6.6°C · 59.8% humidity

6.6°

Feels 3.3°

Good

Air quality is satisfactory. Enjoy outdoor activities.

3 stations

Nearby Monitoring Stations

AQI Forecast

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Station readings

Air Quality Index Trend

48h · 1 stn

View full history →

Chelsea's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

59.8%

Humidity

18.1 km/h

Wind SSE

1029.6 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

3.57 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Chelsea?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station

PM2.53.57 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (3 stations within 25 km)

3.57

Median

2.82

Average

1.07

Low

4.3

High

PM2.5 µg/m³ · Model: 5.8 · Bias: +2.2

Both models agree Avg diff: 4.4°C

Where are air quality stations near Chelsea?

Boston Roxbury

8.0 km PM2.5: 4.3 µg/m³

Boston Roxbury

8.0 km PM2.5: 4.8 µg/m³

Lynn Water Treatment Plant

10.5 km PM2.5: 4.3 µg/m³

Lynn Water Treatment Plant

10.5 km PM2.5: 2.9 µg/m³

Lynn Water Treatment Plant

10.5 km PM2.5: 3.1 µg/m³

East Dedham

18.8 km 12.4°C 68.0% RH PM2.5: 1.3 µg/m³ PM10: 2.2 µg/m³

What cities are near Chelsea?

16 East Boston 15 Orient Heights 15 Everett 14 Revere 16 Charlestown 17 Boston 15 Winthrop 14 Malden 15 Somerville 16 Cambridge

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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 2026-10-20T22:44 UTC.