What is the air quality in Leominster today?

The current Air Quality Index (AQI) in Leominster is 20 (Good). PM2.5 concentration is 4.91 µg/m³.

What is the temperature in Leominster right now?

The current temperature in Leominster is 4.6°C (feels like 1.2°C). Humidity is 70.2% and wind speed is 15.0 km/h.

Is it safe to go outside in Leominster?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Leominster, United States

Cloudy

4.6°C · 70.2% humidity

4.6°

Feels 1.2°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Calibrated model

Nearby Monitoring Stations

AQI Forecast

— 3pm

—

— 6pm

—

— 9pm

—

— 12am

—

— 3am

—

— 6am

—

— 9am

—

— 12pm

—

Air Quality Index Trend

46h · 3 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.

70.2%

Humidity

15.0 km/h

Wind SW

1029.7 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

4.91 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Leominster?

Temperature & Precipitation

PM2.5 Trend

46h · 3 stations

PM2.54.91 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

What is the 7-day forecast for Leominster?

10-20

14.1° 5.3°

12.0 mm

10-21

18.1° 4.6°

10-22

17.6° 3.7°

7.19 mm

10-23

14.5° 3.7°

0.06 mm

10-24

10.5° 7.5°

10-25

18.7° 6.4°

50.06 mm

10-26

10.4° 3.2°

2.63 mm

Both models agree Avg diff: 4.1°C

What cities are near Leominster?

20 Fitchburg 20 Gardner 20 Holden 20 Shrewsbury 18 Marlborough 22 Westford 21 Acton 20 Worcester 18 Sudbury 23 Chelmsford

Get AQI alerts for Leominster

Notify me when air quality reaches:

ModerateAQI > 50 Unhealthy for Sensitive GroupsAQI > 100 UnhealthyAQI > 150 Very UnhealthyAQI > 200

Free · No account · Unsubscribe any time

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-10-20T22:42 UTC.