Today | Weather | Tuesday, September 8, 2026

Weather in Rochester, New Hampshire

05:28 AM
Now
Cloudy Night
55° F
Feels Like 55°
Precipitation 1 %
Wind 4 mph
Humidity 89 %
Today
Cloudy Weather
Day 77°
Night 55°
Precipitation 25 %
Wind 6 mph
UV Index (0 - 11+) 5

Rochester Weather Forecast Updated

24 minutes ago
Last updated on

Air Quality in Rochester

NOW
17 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.29 µg/m³
PM10 1.78 µg/m³
O3 0.018 ppm
NO2 2.3 ppb
SO2 0.1 ppb
CO 0.10 ppm
NH3 0.16 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)
PM2.51.29 µg/m³
PM101.78 µg/m³
O336.19 µg/m³
NO24.41 µg/m³
SO20.37 µg/m³
CO114.12 µg/m³
NH30.16 µg/m³
NO0 µg/m³