What is the air quality in Acton today?

The current Air Quality Index (AQI) in Acton is 18 (Good). PM2.5 concentration is 4.21 µg/m³.

What is the temperature in Acton right now?

The current temperature in Acton is 33.5°C (feels like 37.3°C). Humidity is 45.4% and wind speed is 59.3 km/h.

Is it safe to go outside in Acton?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 14.9 (Extreme).

Air Quality in Acton, United States

Windy

33.5°C · 45.4% humidity

33.5°

Feels 37.3°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Calibrated model

Nearby Monitoring Stations

AQI Forecast

24 10am

18 1pm

22 4pm

23 7pm

24 10pm

24 1am

24 4am

24 7am

Air Quality Index Trend

45h · 4 stn

View full history →

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

45.4%

Humidity

59.3 km/h

Wind WSW

1013.2 hPa

Pressure

14.9

UV Extreme

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

4.21 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Acton?

Temperature & Precipitation

PM2.5 Trend

45h · 4 stations

PM2.54.21 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX14.9

Extreme

What is the 7-day forecast for Acton?

09-05

33.5° 13.0°

12.56 mm

09-06

20.4° 17.3°

3.25 mm

09-07

21.6° 13.2°

09-08

19.0° 16.0°

7.44 mm

09-09

27.6° 10.9°

0.38 mm

09-10

24.3° 12.6°

9.38 mm

09-11

29.9° 12.8°

Both models agree Avg diff: 5.0°C

What cities are near Acton?

19 Westford 15 Sudbury 20 Chelmsford 19 Billerica 15 Marlborough 24 Lowell 13 Waltham 3 Framingham Center 24 Tewksbury 3 Framingham

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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 2026-09-05T17:03 UTC.