Today | Weather | Wednesday, August 12, 2026

Weather in Rochester, New Hampshire

07:15 AM
Now
Cloudy Weather
66° F
Feels Like 64°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 1
Humidity 73 %
Today
Cloudy Weather
Day 84°
Night 61°
Precipitation 5 %
Wind 6 mph
UV Index (0 - 11+) 8

Warning: High UV Index Today: 8

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.

Rochester Weather Forecast Updated

26 minutes ago
Last updated on

Air Quality in Rochester

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

Pollutant Concentrations:

PM2.5 1.84 µg/m³
PM10 2.48 µg/m³
O3 0.006 ppm
NO2 4.2 ppb
SO2 0.2 ppb
CO 0.11 ppm
NH3 0.26 µg/m³
NO 0.5 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)
PM2.51.84 µg/m³
PM102.48 µg/m³
O312.3 µg/m³
NO27.98 µg/m³
SO20.4 µg/m³
CO129.74 µg/m³
NH30.26 µg/m³
NO0.5 µg/m³