What is the air quality in Merrimack today?

The current Air Quality Index (AQI) in Merrimack is 20 (Good). PM2.5 concentration is 4.8 µg/m³.

What is the temperature in Merrimack right now?

The current temperature in Merrimack is 15.2°C (feels like 15.2°C). Humidity is 67.5% and wind speed is 59.1 km/h.

Is it safe to go outside in Merrimack?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.7 (Low).

Air Quality in Merrimack, United States

Rain

15.2°C · 67.5% humidity

15.2°

Feels 15.2°

Good

Air quality is satisfactory. Enjoy outdoor activities.

1 station

Nearby Monitoring Stations

AQI Forecast

25 10pm

20 1am

24 4am

24 7am

24 10am

24 1pm

24 4pm

24 7pm

Air Quality Index Trend

47h · 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.

67.5%

Humidity

59.1 km/h

Wind NW

1014.3 hPa

Pressure

0.7

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

4.8 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Merrimack?

Temperature & Precipitation

PM2.5 Trend

47h · 3 stations

PM2.54.8 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.7

Low

Station readings (1 station within 25 km)

4.8

Median

4.8

Average

4.8

Low

4.8

High

PM2.5 µg/m³ · Model: 5.9 · Bias: +1.1

What is the 7-day forecast for Merrimack?

05-30

24.1° 8.1°

9.37 mm

05-31

24.5° 9.1°

0.13 mm

06-01

23.6° 8.0°

06-02

19.1° 11.6°

0.13 mm

06-03

28.0° 14.5°

06-04

22.2° 18.0°

0.88 mm

06-05

25.5° 10.8°

0.13 mm

Both models agree Avg diff: 5.3°C

Where are air quality stations near Merrimack?

Londonderry - Moose Hill, New Hampshire, USA

9.2 km PM2.5: 10.6 µg/m³

Londonderry - Moose Hill, New Hampshire, USA

9.2 km PM2.5: 5.5 µg/m³

What cities are near Merrimack?

20 Nashua 20 Derry 20 Derry Village 21 Dracut 22 Methuen 22 Lowell 22 Chelmsford 25 Westford 22 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 2026-05-30T05:14 UTC.