Hourly Weather | Today Tuesday, July 21, 2026
Portsmouth, Virginia
5 AM
Cloudy Night
73°
Feels Like 79°
38
Humidity: 97%
UV Index: 0
Wind: 7 mph
6 AM
Cloudy Night
73°
Feels Like 79°
34
Humidity: 100%
UV Index: 0
Wind: 8 mph
7 AM
Cloudy Weather
75°
Feels Like 81°
29
Humidity: 97%
UV Index: 1
Wind: 8 mph
8 AM
Cloudy Weather
81°
Feels Like 88°
20
Humidity: 83%
UV Index: 1
Wind: 12 mph
9 AM
Cloudy Weather
82°
Feels Like 91°
20
Humidity: 78%
UV Index: 3
Wind: 13 mph
10 AM
Cloudy Weather
84°
Feels Like 97°
20
Humidity: 73%
UV Index: 5
Wind: 13 mph
11 AM
Cloudy Weather
88°
Feels Like 99°
20
Humidity: 69%
UV Index: 6
Wind: 14 mph
12 PM
Cloudy Weather
90°
Feels Like 102°
20
Humidity: 65%
UV Index: 10
Wind: 15 mph
1 PM
Cloudy Weather
91°
Feels Like 102°
18
Humidity: 61%
UV Index: 9
Wind: 16 mph
2 PM
Cloudy Weather
91°
Feels Like 102°
15
Humidity: 59%
UV Index: 8
Wind: 15 mph
3 PM
Cloudy Weather
91°
Feels Like 102°
15
Humidity: 58%
UV Index: 6
Wind: 15 mph
4 PM
Cloudy Weather
91°
Feels Like 99°
19
Humidity: 60%
UV Index: 4
Wind: 16 mph
5 PM
Sunny with a Chance of Thunderstorms
88°
Feels Like 93°
51
Humidity: 74%
UV Index: 1
Wind: 16 mph
6 PM
Cloudy Weather
86°
Feels Like 91°
47
Humidity: 71%
UV Index: 2
Wind: 15 mph
7 PM
Cloudy Weather
86°
Feels Like 91°
40
Humidity: 70%
UV Index: 1
Wind: 14 mph
8 PM
Cloudy Weather
86°
Feels Like 91°
34
Humidity: 72%
UV Index: 0
Wind: 13 mph
9 PM
Cloudy Weather
84°
Feels Like 91°
34
Humidity: 74%
UV Index: 0
Wind: 13 mph
10 PM
Cloudy Weather
82°
Feels Like 90°
40
Humidity: 77%
UV Index: 0
Wind: 13 mph
11 PM
Stormy Weather
82°
Feels Like 84°
51
Humidity: 80%
UV Index: 0
Wind: 14 mph

Hourly Air Quality Forecast - AQI (US EPA)

5 AM
14 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.21 µg/m³
  • PM10: 3.04 µg/m³
  • O3: 0.015 ppm
  • NO2: 0.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

6 AM
14 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.37 µg/m³
  • PM10: 3.41 µg/m³
  • O3: 0.016 ppm
  • NO2: 0.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

7 AM
15 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.63 µg/m³
  • PM10: 3.93 µg/m³
  • O3: 0.016 ppm
  • NO2: 0.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

8 AM
15 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.98 µg/m³
  • PM10: 4.64 µg/m³
  • O3: 0.016 ppm
  • NO2: 0.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

9 AM
17 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.51 µg/m³
  • PM10: 5.57 µg/m³
  • O3: 0.018 ppm
  • NO2: 0.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

10 AM
19 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.91 µg/m³
  • PM10: 6.23 µg/m³
  • O3: 0.020 ppm
  • NO2: 0.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

11 AM
21 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.2 µg/m³
  • PM10: 6.6 µg/m³
  • O3: 0.023 ppm
  • NO2: 0.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.06 µg/m³
  • PM10: 5.86 µg/m³
  • O3: 0.028 ppm
  • NO2: 0.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.64 µg/m³
  • PM10: 4.84 µg/m³
  • O3: 0.030 ppm
  • NO2: 0.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.36 µg/m³
  • PM10: 4.3 µg/m³
  • O3: 0.031 ppm
  • NO2: 0.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.27 µg/m³
  • PM10: 4.01 µg/m³
  • O3: 0.031 ppm
  • NO2: 0.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.25 µg/m³
  • PM10: 3.79 µg/m³
  • O3: 0.030 ppm
  • NO2: 0.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.88 µg/m³
  • PM10: 3.24 µg/m³
  • O3: 0.028 ppm
  • NO2: 0.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.53 µg/m³
  • PM10: 2.79 µg/m³
  • O3: 0.027 ppm
  • NO2: 0.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.5 µg/m³
  • PM10: 2.81 µg/m³
  • O3: 0.027 ppm
  • NO2: 0.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

8 PM
25 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.69 µg/m³
  • PM10: 3.15 µg/m³
  • O3: 0.027 ppm
  • NO2: 0.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.03 µg/m³
  • PM10: 3.92 µg/m³
  • O3: 0.028 ppm
  • NO2: 0.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.51 µg/m³
  • PM10: 5.26 µg/m³
  • O3: 0.028 ppm
  • NO2: 0.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.09 µg/m³
  • PM10: 6.9 µg/m³
  • O3: 0.028 ppm
  • NO2: 0.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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