Hourly Weather | Today Thursday, May 21, 2026
Alexandria, Virginia
2 AM
Cloudy Weather
73°
Feels Like 73°
40
Humidity: 80%
UV Index: 0
Wind: 6 mph
3 AM
Cloudy Weather
72°
Feels Like 72°
34
Humidity: 79%
UV Index: 0
Wind: 7 mph
4 AM
Cloudy Weather
72°
Feels Like 72°
40
Humidity: 76%
UV Index: 0
Wind: 7 mph
5 AM
Stormy Weather
72°
Feels Like 66°
64
Humidity: 75%
UV Index: 0
Wind: 7 mph
6 AM
Stormy Weather
72°
Feels Like 66°
64
Humidity: 74%
UV Index: 0
Wind: 8 mph
7 AM
Cloudy Weather
72°
Feels Like 70°
49
Humidity: 70%
UV Index: 0
Wind: 8 mph
8 AM
Cloudy Weather
72°
Feels Like 70°
49
Humidity: 66%
UV Index: 0
Wind: 8 mph
9 AM
Rainy Weather
70°
Feels Like 64°
65
Humidity: 66%
UV Index: 1
Wind: 8 mph
10 AM
Rainy Weather
66°
Feels Like 63°
66
Humidity: 67%
UV Index: 1
Wind: 9 mph
11 AM
Rainy Weather
64°
Feels Like 63°
52
Humidity: 68%
UV Index: 1
Wind: 9 mph
12 PM
Cloudy Weather
64°
Feels Like 66°
48
Humidity: 67%
UV Index: 2
Wind: 9 mph
1 PM
Cloudy Weather
64°
Feels Like 64°
49
Humidity: 68%
UV Index: 2
Wind: 9 mph
2 PM
Rainy Weather
64°
Feels Like 61°
70
Humidity: 70%
UV Index: 2
Wind: 8 mph
3 PM
Rainy Weather
63°
Feels Like 61°
70
Humidity: 74%
UV Index: 1
Wind: 8 mph
4 PM
Rainy Weather
63°
Feels Like 59°
70
Humidity: 75%
UV Index: 1
Wind: 8 mph
5 PM
Cloudy Weather
63°
Feels Like 61°
40
Humidity: 79%
UV Index: 1
Wind: 7 mph
6 PM
Cloudy Weather
63°
Feels Like 61°
34
Humidity: 79%
UV Index: 1
Wind: 7 mph
7 PM
Cloudy Weather
63°
Feels Like 61°
40
Humidity: 81%
UV Index: 0
Wind: 7 mph
8 PM
Stormy Weather
61°
Feels Like 57°
70
Humidity: 81%
UV Index: 0
Wind: 7 mph
9 PM
Stormy Weather
61°
Feels Like 57°
62
Humidity: 83%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Weather
61°
Feels Like 57°
49
Humidity: 84%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Weather
61°
Feels Like 57°
34
Humidity: 84%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

2 AM
16 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.43 µg/m³
  • PM10: 3.97 µg/m³
  • O3: 0.017 ppm
  • NO2: 2.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

3 AM
15 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 3.65 µg/m³
  • PM10: 4.18 µg/m³
  • O3: 0.014 ppm
  • NO2: 2.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

4 AM
16 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 3.94 µg/m³
  • PM10: 4.51 µg/m³
  • O3: 0.012 ppm
  • NO2: 2.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.26 µg/m³
  • PM10: 4.89 µg/m³
  • O3: 0.010 ppm
  • NO2: 2.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

6 AM
19 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 4.5 µg/m³
  • PM10: 5.15 µg/m³
  • O3: 0.009 ppm
  • NO2: 3 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

7 AM
19 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 4.67 µg/m³
  • PM10: 5.4 µg/m³
  • O3: 0.009 ppm
  • NO2: 3.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

8 AM
20 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 4.78 µg/m³
  • PM10: 5.58 µg/m³
  • O3: 0.009 ppm
  • NO2: 4.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.71 µg/m³
  • PM10: 5.58 µg/m³
  • O3: 0.012 ppm
  • NO2: 4.8 ppb
  • SO2: 0.5 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.36 µg/m³
  • PM10: 5.12 µg/m³
  • O3: 0.015 ppm
  • NO2: 4.8 ppb
  • SO2: 0.6 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.84 µg/m³
  • PM10: 4.47 µg/m³
  • O3: 0.017 ppm
  • NO2: 4.8 ppb
  • SO2: 0.7 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.43 µg/m³
  • PM10: 3.94 µg/m³
  • O3: 0.021 ppm
  • NO2: 4.6 ppb
  • SO2: 0.7 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.26 µg/m³
  • PM10: 3.64 µg/m³
  • O3: 0.026 ppm
  • NO2: 4.4 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.95 µg/m³
  • PM10: 3.2 µg/m³
  • O3: 0.030 ppm
  • NO2: 4 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.57 µg/m³
  • PM10: 2.74 µg/m³
  • O3: 0.034 ppm
  • NO2: 3.5 ppb
  • SO2: 0.5 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.4 µg/m³
  • PM10: 2.56 µg/m³
  • O3: 0.035 ppm
  • NO2: 3.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.37 µg/m³
  • PM10: 2.54 µg/m³
  • O3: 0.035 ppm
  • NO2: 3.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.37 µg/m³
  • PM10: 2.53 µg/m³
  • O3: 0.034 ppm
  • NO2: 3.8 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.41 µg/m³
  • PM10: 2.56 µg/m³
  • O3: 0.032 ppm
  • NO2: 4.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.42 µg/m³
  • PM10: 2.58 µg/m³
  • O3: 0.030 ppm
  • NO2: 4.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 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: 2.37 µg/m³
  • PM10: 2.53 µg/m³
  • O3: 0.029 ppm
  • NO2: 4.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.37 µg/m³
  • PM10: 2.53 µg/m³
  • O3: 0.027 ppm
  • NO2: 4.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

11 PM
24 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.42 µg/m³
  • PM10: 2.61 µg/m³
  • O3: 0.026 ppm
  • NO2: 4.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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