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Weather in Portsmouth, Virginia

11:36 PM
Today
Cloudy Night
Day 64°
Night 46°
Precipitation 0 %
Wind 4 mph

Portsmouth Weather Forecast Updated

19 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (November 1, 2025)
Night

Day

64°

Night

39°

Wind

2 mph

Precipitation

1 %

Air Quality in Portsmouth

NOW
38 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.23 µg/m³
PM10 8.03 µg/m³
O3 0.041 ppm
NO2 1.3 ppb
SO2 0.2 ppb
CO 0.14 ppm
NH3 0.31 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)
PM2.5 – 4.23 µg/m³
PM10 – 8.03 µg/m³
O3 – 79.86 µg/m³
NO2 – 2.47 µg/m³
SO2 – 0.58 µg/m³
CO – 154.86 µg/m³
NH3 – 0.31 µg/m³
NO – 0 µg/m³