Today | Weather | Wednesday, August 12, 2026

Weather in Portsmouth, Virginia

07:50 AM
Now
Cloudy Weather
73° F
Feels Like 77°
Precipitation 18 %
Wind 7 mph
UV Index (0 - 11+) 2
Humidity 82 %
Today
Sunny with a Chance of Thunderstorms
Day 90°
Night 73°
Precipitation 55 %
Wind 7 mph
UV Index (0 - 11+) 9

Warning: High UV Index Today: 9

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.

Portsmouth Weather Forecast Updated

31 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (August 12, 2025)
Stormy Weather

Day

90°

Night

73°

Wind

6 mph

Precipitation

80 %

Air Quality in Portsmouth

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

Pollutant Concentrations:

PM2.5 5.36 µg/m³
PM10 6.53 µg/m³
O3 0.013 ppm
NO2 1.5 ppb
SO2 0.2 ppb
CO 0.12 ppm
NH3 0.97 µg/m³
NO 0.24 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)
PM2.55.36 µg/m³
PM106.53 µg/m³
O326.28 µg/m³
NO22.83 µg/m³
SO20.44 µg/m³
CO137.09 µg/m³
NH30.97 µg/m³
NO0.24 µg/m³