What is the air quality in Leominster today?

The current Air Quality Index (AQI) in Leominster is 19 (Good). PM2.5 concentration is 4.5 µg/m³.

What is the temperature in Leominster right now?

The current temperature in Leominster is 32.6°C (feels like 36.1°C). Humidity is 46.2% and wind speed is 58.9 km/h.

Is it safe to go outside in Leominster?

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

Air Quality in Leominster, United States

Windy

32.6°C · 46.2% humidity

32.6°

Feels 36.1°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Calibrated model

Nearby Monitoring Stations

AQI Forecast

24 9am

19 12pm

22 3pm

23 6pm

25 9pm

24 12am

24 3am

24 6am

Air Quality Index Trend

45h · 2 stn

View full history →

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

46.2%

Humidity

58.9 km/h

Wind WSW

1013.6 hPa

Pressure

14.9

UV Extreme

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

4.5 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Leominster?

Temperature & Precipitation

PM2.5 Trend

45h · 2 stations

PM2.54.5 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX14.9

Extreme

What is the 7-day forecast for Leominster?

09-05

32.6° 12.1°

12.87 mm

09-06

19.8° 17.0°

4.12 mm

09-07

21.0° 12.8°

0.06 mm

09-08

18.5° 15.8°

6.62 mm

09-09

27.1° 10.0°

0.5 mm

09-10

23.8° 11.9°

19.75 mm

09-11

29.7° 11.6°

Both models agree Avg diff: 5.2°C

What cities are near Leominster?

19 Fitchburg 19 Gardner 19 Holden 18 Shrewsbury 15 Marlborough 19 Westford 18 Acton 20 Worcester 15 Sudbury 20 Chelmsford

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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 2026-09-05T16:33 UTC.