What is the air quality in Marlborough today?

The current Air Quality Index (AQI) in Marlborough is 18 (Good). PM2.5 concentration is 4.18 µg/m³.

What is the temperature in Marlborough right now?

The current temperature in Marlborough 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 Marlborough?

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

Air Quality in Marlborough, 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

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Air Quality Index Trend

46h · 2 stn

View full history →

Marlborough'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▲

4.18 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Marlborough?

Temperature & Precipitation

PM2.5 Trend

46h · 2 stations

PM2.54.18 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

What is the 7-day forecast for Marlborough?

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: 4.4°C

What cities are near Marlborough?

5 Framingham Center 12 Ashland 18 Sudbury 5 Framingham 20 Shrewsbury 9 Natick 21 Acton 20 Grafton 9 Wellesley 20 Worcester

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

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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 2026-10-20T22:42 UTC.