What is the air quality in Merrimack today?

The current Air Quality Index (AQI) in Merrimack is 21 (Good). PM2.5 concentration is 5.05 µg/m³.

What is the temperature in Merrimack right now?

The current temperature in Merrimack is 32.8°C (feels like 35.6°C). Humidity is 41.6% and wind speed is 58.4 km/h.

Is it safe to go outside in Merrimack?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 12.9 (Extreme).

Air Quality in Merrimack, United States

Windy

32.8°C · 41.6% humidity

32.8°

Feels 35.6°

Good

Air quality is satisfactory. Enjoy outdoor activities.

2 stations

Nearby Monitoring Stations

AQI Forecast

24 9am

21 12pm

24 3pm

24 6pm

24 9pm

24 12am

24 3am

24 6am

Air Quality Index Trend

45h · 2 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.

41.6%

Humidity

58.4 km/h

Wind WSW

1012.8 hPa

Pressure

12.9

UV Extreme

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

5.05 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Merrimack?

Temperature & Precipitation

PM2.5 Trend

45h · 2 stations

PM2.55.05 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX12.9

Extreme

Station readings (2 stations within 25 km)

5.05

Median

5.05

Average

4.6

Low

5.5

High

PM2.5 µg/m³ · Model: 5.8 · Bias: +0.8

What is the 7-day forecast for Merrimack?

09-05

32.8° 12.6°

9.25 mm

09-06

20.6° 16.0°

1.94 mm

09-07

22.1° 12.5°

1.37 mm

09-08

16.9° 15.3°

8.5 mm

09-09

26.9° 11.0°

1.56 mm

09-10

23.5° 12.9°

18.44 mm

09-11

29.6° 12.1°

Both models agree Avg diff: 4.9°C

Where are air quality stations near Merrimack?

Londonderry - Moose Hill, New Hampshire, USA

9.2 km PM2.5: 4.6 µg/m³

Londonderry - Moose Hill, New Hampshire, USA

9.2 km PM2.5: 5.0 µg/m³

What cities are near Merrimack?

21 Nashua 21 Derry 21 Derry Village 21 Dracut 21 Methuen 24 Lowell 20 Chelmsford 19 Westford 24 North Andover 24 Tewksbury

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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 2026-09-05T16:32 UTC.