What is the air quality in Leominster today?

The current Air Quality Index (AQI) in Leominster is 48 (Good). PM2.5 concentration is 11.63 µg/m³.

What is the temperature in Leominster right now?

The current temperature in Leominster is 15.2°C (feels like 15.2°C). Humidity is 98.2% and wind speed is 70.4 km/h.

Is it safe to go outside in Leominster?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 2.2 (Moderate).

Air Quality in Leominster, United States

Rain

15.2°C · 98.2% humidity

15.2°

Feels 15.2°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Calibrated model

Nearby Monitoring Stations

AQI Forecast

34 3pm

48 6pm

32 9pm

26 12am

25 3am

24 6am

24 9am

24 12pm

Air Quality Index Trend

47h · 1 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.

98.2%

Humidity

70.4 km/h

Wind NNE

1013.4 hPa

Pressure

2.2

UV Moderate

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

11.63 µg/m³

PM10

27.45 µg/m³

050100150200300500

What is the weather forecast for Leominster?

Temperature & Precipitation

PM2.5 Trend

47h · 1 station

PM2.511.63 µg/m³ ✓ WHO

Good

PM1027.45 µg/m³

Good

UV INDEX2.2

Moderate

What is the 7-day forecast for Leominster?

07-21

25.3° 18.5°

2.25 mm

07-22

21.1° 13.7°

14.19 mm

07-23

26.6° 15.5°

1.31 mm

07-24

28.7° 14.4°

2.13 mm

07-25

32.0° 19.9°

3.88 mm

07-26

22.6° 16.4°

3.62 mm

07-27

28.5° 13.9°

2.12 mm

Both models agree Avg diff: 3.2°C

What cities are near Leominster?

49 Fitchburg 47 Gardner 42 Holden 42 Shrewsbury 42 Marlborough 37 Westford 53 Acton 42 Worcester 64 Sudbury 40 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 2026-07-21T22:04 UTC.