Hourly Weather | Today Saturday, September 19, 2026
Alexandria, Virginia
3 AM
Cloudy Night
72°
Feels Like 70°
0
Humidity: 72%
UV Index: 0
Wind: 7 mph
4 AM
Cloudy Night
70°
Feels Like 66°
0
Humidity: 72%
UV Index: 0
Wind: 7 mph
5 AM
Cloudy Night
70°
Feels Like 66°
0
Humidity: 73%
UV Index: 0
Wind: 7 mph
6 AM
Cloudy Night
68°
Feels Like 64°
0
Humidity: 74%
UV Index: 0
Wind: 7 mph
7 AM
Cloudy Weather
66°
Feels Like 64°
0
Humidity: 75%
UV Index: 0
Wind: 7 mph
8 AM
Cloudy Weather
68°
Feels Like 66°
0
Humidity: 71%
UV Index: 1
Wind: 7 mph
9 AM
Cloudy Weather
70°
Feels Like 70°
0
Humidity: 68%
UV Index: 2
Wind: 7 mph
10 AM
Cloudy Weather
72°
Feels Like 73°
0
Humidity: 66%
UV Index: 3
Wind: 7 mph
11 AM
Cloudy Weather
73°
Feels Like 77°
0
Humidity: 64%
UV Index: 4
Wind: 7 mph
12 PM
Cloudy Weather
75°
Feels Like 79°
0
Humidity: 61%
UV Index: 5
Wind: 7 mph
1 PM
Cloudy Weather
75°
Feels Like 79°
0
Humidity: 60%
UV Index: 3
Wind: 7 mph
2 PM
Cloudy Weather
77°
Feels Like 77°
0
Humidity: 60%
UV Index: 2
Wind: 7 mph
3 PM
Cloudy Weather
79°
Feels Like 79°
0
Humidity: 59%
UV Index: 1
Wind: 7 mph
4 PM
Cloudy Weather
77°
Feels Like 77°
0
Humidity: 62%
UV Index: 1
Wind: 7 mph
5 PM
Cloudy Weather
75°
Feels Like 75°
0
Humidity: 65%
UV Index: 1
Wind: 7 mph
6 PM
Cloudy Weather
75°
Feels Like 75°
0
Humidity: 68%
UV Index: 1
Wind: 6 mph
7 PM
Cloudy Weather
73°
Feels Like 73°
0
Humidity: 73%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Night
72°
Feels Like 72°
2
Humidity: 77%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
72°
Feels Like 72°
2
Humidity: 82%
UV Index: 0
Wind: 2 mph
10 PM
Cloudy Night
70°
Feels Like 72°
2
Humidity: 83%
UV Index: 0
Wind: 2 mph
11 PM
Cloudy Night
70°
Feels Like 70°
2
Humidity: 86%
UV Index: 0
Wind: 2 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 9.03 µg/m³
  • PM10: 9.85 µg/m³
  • O3: 0.028 ppm
  • NO2: 2.3 ppb
  • SO2: 0.7 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.7 µg/m³
  • PM10: 8.57 µg/m³
  • O3: 0.028 ppm
  • NO2: 2.3 ppb
  • SO2: 0.7 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.46 µg/m³
  • PM10: 7.37 µg/m³
  • O3: 0.028 ppm
  • NO2: 2.2 ppb
  • SO2: 0.7 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.53 µg/m³
  • PM10: 6.39 µg/m³
  • O3: 0.027 ppm
  • NO2: 2.2 ppb
  • SO2: 0.7 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.91 µg/m³
  • PM10: 5.66 µg/m³
  • O3: 0.027 ppm
  • NO2: 2.3 ppb
  • SO2: 0.7 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.51 µg/m³
  • PM10: 5.21 µg/m³
  • O3: 0.026 ppm
  • NO2: 2.7 ppb
  • SO2: 0.6 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.28 µg/m³
  • PM10: 5 µg/m³
  • O3: 0.024 ppm
  • NO2: 3 ppb
  • SO2: 0.6 ppb
  • CO: 0.16 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.31 µg/m³
  • PM10: 5.12 µg/m³
  • O3: 0.023 ppm
  • NO2: 3.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.65 µg/m³
  • PM10: 5.56 µg/m³
  • O3: 0.023 ppm
  • NO2: 3.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.55 µg/m³
  • PM10: 6.64 µg/m³
  • O3: 0.025 ppm
  • NO2: 2.8 ppb
  • SO2: 0.6 ppb
  • CO: 0.16 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.81 µg/m³
  • PM10: 8.18 µg/m³
  • O3: 0.029 ppm
  • NO2: 2.5 ppb
  • SO2: 0.6 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

2 PM
34 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.06 µg/m³
  • PM10: 9.81 µg/m³
  • O3: 0.034 ppm
  • NO2: 2.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

3 PM
38 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.1 µg/m³
  • PM10: 11.43 µg/m³
  • O3: 0.040 ppm
  • NO2: 1.6 ppb
  • SO2: 0.5 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

4 PM
40 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.49 µg/m³
  • PM10: 12.17 µg/m³
  • O3: 0.043 ppm
  • NO2: 1.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.38 µg/m³
  • PM10: 12.31 µg/m³
  • O3: 0.044 ppm
  • NO2: 1.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.07 µg/m³
  • PM10: 12.15 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

7 PM
36 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.64 µg/m³
  • PM10: 11.82 µg/m³
  • O3: 0.039 ppm
  • NO2: 1.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.04 µg/m³
  • PM10: 11.27 µg/m³
  • O3: 0.036 ppm
  • NO2: 1.7 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 PM
32 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.15 µg/m³
  • PM10: 10.34 µg/m³
  • O3: 0.034 ppm
  • NO2: 1.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.33 µg/m³
  • PM10: 9.46 µg/m³
  • O3: 0.033 ppm
  • NO2: 1.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.85 µg/m³
  • PM10: 8.94 µg/m³
  • O3: 0.032 ppm
  • NO2: 1.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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