Air Quality in Billerica, United States
Windy
20.7°C · 72.5% humidity
20.7°
Feels 20.7°
39
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
Billerica's air quality — share it
AQI Forecast
Calibrated
62
1pm
62
62
39
4pm
46
50
54
7pm
56
58
52
10pm
53
51
52
1am
51
51
52
4am
52
52
52
7am
52
52
52
10am
52
52
Station readings
62
65
65
71
CAMS model
adj +28
34
34
34
34
34
34
34
34
34
27
27
25
25
24
24
24
24
24
24
24
24
24
24
24
Air Quality Index Trend
48h · 1 stnBillerica's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
72.5%
Humidity
64.5 km/h
Wind NE
1014.8 hPa
Pressure
7.9
UV Very High
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
9.36 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Billerica?
Temperature & Precipitation
PM2.5 Trend
48h · 1 stationPM2.59.36 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX7.9
Very High
Station readings (1 station within 25 km)
9.36
Median
9.36
Average
9.36
Low
9.36
High
PM2.5 µg/m³ · Model: 13.7 · Bias: +4.3
What is the 7-day forecast for Billerica?
07-21
26.5° 19.6°
3.31 mm
07-22
22.5° 14.3°
12.25 mm
07-23
26.7° 16.6°
1.88 mm
07-24
25.9° 14.7°
1.63 mm
07-25
34.8° 19.7°
3.44 mm
07-26
22.9° 16.2°
2.94 mm
07-27
29.2° 15.2°
2.31 mm
Both models agree
Avg diff: 3.5°C
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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 2026-07-21T20:45 UTC.