What is the air quality in Merrimack today?

The current Air Quality Index (AQI) in Merrimack is 36 (Good). PM2.5 concentration is 8.6 µg/m³.

What is the temperature in Merrimack right now?

The current temperature in Merrimack is 14.6°C (feels like 14.6°C). Humidity is 42.2% and wind speed is 37.5 km/h.

Is it safe to go outside in Merrimack?

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

Air Quality in Merrimack, United States

Clear

14.6°C · 42.2% humidity

14.6°

Feels 14.6°

Good

Air quality is satisfactory. Enjoy outdoor activities.

1 station

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

41h · 3 stn

View full history →

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

42.2%

Humidity

37.5 km/h

Wind W

1020.8 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

8.6 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Merrimack?

Temperature & Precipitation

PM2.5 Trend

41h · 3 stations

PM2.58.6 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (1 station within 25 km)

8.6

Median

8.6

Average

8.6

Low

8.6

High

PM2.5 µg/m³ · Model: 6.0 · Bias: -2.6

What is the 7-day forecast for Merrimack?

10-20

14.6° 4.9°

10.88 mm

10-21

19.8° 3.6°

10-22

16.7° 4.6°

6.44 mm

10-23

14.2° 2.6°

0.06 mm

10-24

10.8° 7.2°

10-25

20.5° 5.2°

35.81 mm

10-26

10.6° 3.6°

2.31 mm

Both models agree Avg diff: 4.5°C

Where are air quality stations near Merrimack?

Londonderry - Moose Hill, New Hampshire, USA

9.2 km PM2.5: 7.9 µg/m³

What cities are near Merrimack?

36 Nashua 36 Derry 36 Derry Village 36 Dracut 36 Methuen 26 Lowell 23 Chelmsford 22 Westford 24 North Andover 22 Tewksbury

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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 2026-10-20T20:56 UTC.