Today | Weather | Wednesday, March 18, 2026

Weather in Nashua, New Hampshire

04:01 AM
Now
Night
25° F
Feels Like 14°
Precipitation 0 %
Wind 9 mph
Humidity 46 %
Today
Cloudy Weather
Day 36°
Night 21°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 4
Overnight Frost 6 AM – 7 AM
Tomorrow Morning Frost 5 AM – 7 AM

Nashua Weather Forecast Updated

Last updated on

Air Quality in Nashua

NOW
46 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.51 µg/m³
PM10 1.05 µg/m³
O3 0.049 ppm
NO2 1.6 ppb
SO2 0.3 ppb
CO 0.14 ppm
NH3 0.27 µg/m³
NO 0 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.50.51 µg/m³
PM101.05 µg/m³
O397.15 µg/m³
NO22.92 µg/m³
SO20.79 µg/m³
CO164.84 µg/m³
NH30.27 µg/m³
NO0 µg/m³