Today | Weather | Tuesday, September 1, 2026

Weather in Rochester, New Hampshire

11:26 AM
Now
Rainy Weather
68° F
Feels Like 68°
Precipitation 47 %
Wind 4 mph
UV Index (0 - 11+) 1
Humidity 79 %
Today
Rainy Weather
Day 70°
Night 59°
Precipitation 95 %
Wind 4 mph
UV Index (0 - 11+) 2

Rochester Weather Forecast Updated

51 minutes ago
Last updated on

Air Quality in Rochester

NOW
30 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 7.27 µg/m³
PM10 8.79 µg/m³
O3 0.018 ppm
NO2 5.7 ppb
SO2 0.3 ppb
CO 0.16 ppm
NH3 0.15 µg/m³
NO 1.22 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)
PM2.57.27 µg/m³
PM108.79 µg/m³
O336.09 µg/m³
NO210.76 µg/m³
SO20.83 µg/m³
CO183.72 µg/m³
NH30.15 µg/m³
NO1.22 µg/m³