What is the air quality in Charlestown today?

The current Air Quality Index (AQI) in Charlestown is 22 (Good). PM2.5 concentration is 5.22 µg/m³.

What is the temperature in Charlestown right now?

The current temperature in Charlestown 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 Charlestown?

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

Air Quality in Charlestown, United States

Partly Cloudy

6.6°C · 59.8% humidity

6.6°

Feels 3.3°

Good

Air quality is satisfactory. Enjoy outdoor activities.

4 stations

Nearby Monitoring Stations

AQI Forecast

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Station readings

Air Quality Index Trend

47h · 1 stn

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Charlestown'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▲

5.22 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Charlestown?

Temperature & Precipitation

PM2.5 Trend

47h · 1 station

PM2.55.22 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (4 stations within 25 km)

5.22

Median

4.92

Average

1.47

Low

7.0

High

PM2.5 µg/m³ · Model: 5.8 · Bias: +0.6

What is the 7-day forecast for Charlestown?

10-21

19.9° 4.9°

10-22

18.6° 6.7°

1.25 mm

10-23

15.4° 4.5°

10-24

12.0° 8.6°

10-25

21.1° 7.4°

29.44 mm

10-26

11.1° 5.6°

4.06 mm

10-27

11.4° 4.7°

2.12 mm

Both models agree Avg diff: 4.3°C

Where are air quality stations near Charlestown?

Boston

2.2 km PM2.5: 6.0 µg/m³

Boston Roxbury

5.6 km PM2.5: 7.0 µg/m³

Boston Roxbury

5.6 km PM2.5: 4.8 µg/m³

Lynn Water Treatment Plant

13.1 km PM2.5: 6.2 µg/m³

Lynn Water Treatment Plant

13.1 km PM2.5: 4.3 µg/m³

East Dedham

16.3 km 12.2°C 59.0% RH PM2.5: 1.1 µg/m³ PM10: 1.8 µg/m³

What cities are near Charlestown?

22 East Boston 21 Boston 23 Chelsea 23 Somerville 23 Everett 23 Cambridge 25 Back Bay 26 Fenway/Kenmore 23 Orient Heights 25 South Boston

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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 2026-10-21T01:07 UTC.