Today | Weather | Wednesday, May 20, 2026

Weather in Nashua, New Hampshire

05:53 PM
Now
Cloudy Weather
86° F
Feels Like 84°
Precipitation 17 %
Wind 14 mph
UV Index (0 - 11+) 2
Humidity 37 %
Today
Sunny with a Chance of Thunderstorms
Day 88°
Night 55°
Precipitation 49 %
Wind 12 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

Last updated on

Air Quality in Nashua

NOW
38 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.01 µg/m³
PM10 3.21 µg/m³
O3 0.041 ppm
NO2 1.9 ppb
SO2 0.2 ppb
CO 0.12 ppm
NH3 0.27 µg/m³
NO 0.27 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)
PM2.53.01 µg/m³
PM103.21 µg/m³
O380.64 µg/m³
NO23.55 µg/m³
SO20.5 µg/m³
CO140.19 µg/m³
NH30.27 µg/m³
NO0.27 µg/m³