Air Quality in Acton, United States
Windy
18.7°C · 90.3% humidity
18.7°
Feels 18.7°
47
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model
Nearby Monitoring Stations
AQI Forecast
34
1pm
34
34
47
4pm
43
41
39
7pm
30
29
27
10pm
26
25
25
1am
24
24
24
4am
24
24
24
7am
24
24
24
10am
24
24
Air Quality Index Trend
48h · 2 stnActon's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
90.3%
Humidity
60.5 km/h
Wind NE
1014.0 hPa
Pressure
7.9
UV Very High
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
11.33 µg/m³
PM10
27.45 µg/m³
050100150200300500
What is the weather forecast for Acton?
Temperature & Precipitation
PM2.5 Trend
48h · 2 stationsPM2.511.33 µg/m³
✓ WHO
Good
PM1027.45 µg/m³
Good
UV INDEX7.9
Very High
What is the 7-day forecast for Acton?
07-21
26.4° 18.7°
3.81 mm
07-22
22.0° 14.0°
11.0 mm
07-23
27.6° 15.9°
1.25 mm
07-24
25.9° 14.8°
2.19 mm
07-25
34.8° 20.3°
2.44 mm
07-26
22.4° 16.8°
2.0 mm
07-27
29.2° 14.6°
3.06 mm
Both models agree
Avg diff: 3.3°C
What cities are near Acton?
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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 2026-07-21T20:44 UTC.