Today | Weather | Tuesday, September 1, 2026

Weather in Portsmouth, Virginia

11:26 AM
Now
Cloudy Weather
88° F
Feels Like 99°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 5
Humidity 64 %
Today
Cloudy Weather
Day 97°
Night 75°
Precipitation 18 %
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.

Portsmouth Weather Forecast Updated

5 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 1, 2025)
Rainy Night

Day

79°

Night

63°

Wind

7 mph

Precipitation

49 %

Air Quality in Portsmouth

NOW
17 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.13 µg/m³
PM10 4.42 µg/m³
O3 0.019 ppm
NO2 0.8 ppb
SO2 0.1 ppb
CO 0.10 ppm
NH3 1.05 µg/m³
NO 0.55 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)
PM2.53.13 µg/m³
PM104.42 µg/m³
O336.97 µg/m³
NO21.55 µg/m³
SO20.33 µg/m³
CO113.62 µg/m³
NH31.05 µg/m³
NO0.55 µg/m³