Air Quality in Leominster, United States
Cloudy
13.9°C · 73.5% humidity
13.9°
Feels 13.9°
28
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model
Nearby Monitoring Stations
Leominster's air quality — share it
AQI Forecast
25
7pm
25
25
28
10pm
34
34
34
1am
54
54
54
4am
34
34
27
7am
25
25
25
10am
25
25
25
1pm
25
25
25
4pm
25
25
Air Quality Index Trend
47h · 2 stnLeominster's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
73.5%
Humidity
21.4 km/h
Wind WSW
999.4 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
6.81 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Leominster?
Temperature & Precipitation
PM2.5 Trend
47h · 2 stationsPM2.56.81 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
What is the 7-day forecast for Leominster?
06-09
33.0° 11.8°
0.06 mm
06-10
22.2° 11.7°
1.19 mm
06-11
25.1° 9.7°
06-12
20.2° 13.7°
2.25 mm
06-13
30.2° 16.1°
0.25 mm
06-14
22.9° 8.9°
25.25 mm
06-15
26.7° 14.6°
0.88 mm
Both models agree
Avg diff: 7.7°C
What cities are near Leominster?
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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 2026-06-09T02:21 UTC.