Hourly Weather | Today Wednesday, August 12, 2026
Portsmouth, Virginia
9 AM
Cloudy Weather
75°
Feels Like 82°
18
Humidity: 83%
UV Index: 3
Wind: 7 mph
10 AM
Cloudy Weather
79°
Feels Like 88°
18
Humidity: 76%
UV Index: 4
Wind: 7 mph
11 AM
Cloudy Weather
82°
Feels Like 91°
18
Humidity: 67%
UV Index: 6
Wind: 8 mph
12 PM
Cloudy Weather
84°
Feels Like 97°
18
Humidity: 60%
UV Index: 9
Wind: 8 mph
1 PM
Cloudy Weather
88°
Feels Like 99°
18
Humidity: 55%
UV Index: 9
Wind: 8 mph
2 PM
Cloudy Weather
88°
Feels Like 99°
19
Humidity: 52%
UV Index: 9
Wind: 8 mph
3 PM
Cloudy Weather
90°
Feels Like 99°
19
Humidity: 51%
UV Index: 6
Wind: 8 mph
4 PM
Cloudy Weather
90°
Feels Like 97°
24
Humidity: 49%
UV Index: 4
Wind: 7 mph
5 PM
Cloudy Weather
90°
Feels Like 93°
47
Humidity: 51%
UV Index: 3
Wind: 7 mph
6 PM
Sunny with a Chance of Thunderstorms
88°
Feels Like 90°
51
Humidity: 56%
UV Index: 2
Wind: 7 mph
7 PM
Cloudy Weather
86°
Feels Like 90°
43
Humidity: 60%
UV Index: 1
Wind: 7 mph
8 PM
Sunny with a Chance of Thunderstorms
82°
Feels Like 84°
51
Humidity: 67%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Night
81°
Feels Like 84°
47
Humidity: 74%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
79°
Feels Like 82°
40
Humidity: 81%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Night
77°
Feels Like 82°
34
Humidity: 83%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

9 AM
22 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.22 µg/m³
  • PM10: 6.33 µg/m³
  • O3: 0.015 ppm
  • NO2: 1.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 AM
22 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.17 µg/m³
  • PM10: 6.23 µg/m³
  • O3: 0.018 ppm
  • NO2: 1.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 AM
23 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.5 µg/m³
  • PM10: 6.49 µg/m³
  • O3: 0.024 ppm
  • NO2: 0.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

12 PM
36 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.14 µg/m³
  • PM10: 5.72 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

1 PM
40 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.73 µg/m³
  • PM10: 5.14 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

2 PM
42 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.72 µg/m³
  • PM10: 5.09 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

3 PM
41 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.82 µg/m³
  • PM10: 5.18 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

4 PM
39 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.95 µg/m³
  • PM10: 5.33 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

5 PM
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.11 µg/m³
  • PM10: 5.51 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

6 PM
32 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.31 µg/m³
  • PM10: 5.81 µg/m³
  • O3: 0.035 ppm
  • NO2: 1.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 PM
26 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.58 µg/m³
  • PM10: 6.27 µg/m³
  • O3: 0.028 ppm
  • NO2: 2 ppb
  • SO2: 0.1 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 PM
24 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.75 µg/m³
  • PM10: 6.62 µg/m³
  • O3: 0.024 ppm
  • NO2: 2.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 PM
25 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.94 µg/m³
  • PM10: 6.95 µg/m³
  • O3: 0.021 ppm
  • NO2: 2.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 PM
26 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.14 µg/m³
  • PM10: 7.23 µg/m³
  • O3: 0.019 ppm
  • NO2: 2.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 PM
26 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.18 µg/m³
  • PM10: 7.29 µg/m³
  • O3: 0.018 ppm
  • NO2: 2.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.