Today | Weather | Monday, July 20, 2026

Weather in Nashua, New Hampshire

05:25 PM
Now
Cloudy Weather
82° F
Feels Like 84°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 3
Humidity 32 %
Today
Cloudy Weather
Day 82°
Night 57°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 9

Warning: High UV Index Today: 9

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Nashua Weather Forecast Updated

3 minutes ago
Last updated on

Air Quality in Nashua

NOW
47 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.16 µg/m³
PM10 3.55 µg/m³
O3 0.051 ppm
NO2 0.6 ppb
SO2 0.2 ppb
CO 0.09 ppm
NH3 0.23 µg/m³
NO 0.21 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)
PM2.53.16 µg/m³
PM103.55 µg/m³
O3100.38 µg/m³
NO21.19 µg/m³
SO20.57 µg/m³
CO98.11 µg/m³
NH30.23 µg/m³
NO0.21 µg/m³