Today | Weather | Thursday, December 4, 2025

Weather in Portsmouth, Virginia

05:08 AM
Now
Cloudy Night
30° F
Feels Like 28°
Precipitation 0 %
Wind 5 mph
Humidity 90 %
Today
Cloudy Weather
Day 50°
Night 34°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 3

Portsmouth Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 4, 2024)
Cloudy Night

Day

48°

Night

41°

Wind

16 mph

Precipitation

3 %

Air Quality in Portsmouth

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

Pollutant Concentrations:

PM2.5 11.95 µg/m³
PM10 13.54 µg/m³
O3 0.017 ppm
NO2 5.4 ppb
SO2 0.1 ppb
CO 0.20 ppm
NH3 1.57 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)
PM2.511.95 µg/m³
PM1013.54 µg/m³
O334.16 µg/m³
NO210.16 µg/m³
SO20.31 µg/m³
CO233.39 µg/m³
NH31.57 µg/m³
NO0 µg/m³