Hourly Weather | Today Wednesday, March 18, 2026
Alexandria, Virginia
5 AM
Cloudy Night
28°
Feels Like 25°
0
Humidity: 53%
UV Index: 0
Wind: 7 mph
6 AM
Cloudy Night
28°
Feels Like 25°
0
Humidity: 53%
UV Index: 0
Wind: 6 mph
7 AM
Cloudy Night
28°
Feels Like 25°
0
Humidity: 54%
UV Index: 0
Wind: 6 mph
8 AM
Cloudy Weather
30°
Feels Like 27°
0
Humidity: 51%
UV Index: 1
Wind: 6 mph
9 AM
Cloudy Weather
32°
Feels Like 30°
0
Humidity: 45%
UV Index: 1
Wind: 6 mph
10 AM
Cloudy Weather
34°
Feels Like 36°
0
Humidity: 40%
UV Index: 2
Wind: 6 mph
11 AM
Cloudy Weather
36°
Feels Like 39°
0
Humidity: 36%
UV Index: 4
Wind: 6 mph
12 PM
Cloudy Weather
37°
Feels Like 43°
0
Humidity: 32%
UV Index: 4
Wind: 6 mph
1 PM
Cloudy Weather
39°
Feels Like 43°
0
Humidity: 30%
UV Index: 3
Wind: 7 mph
2 PM
Cloudy Weather
41°
Feels Like 43°
0
Humidity: 28%
UV Index: 2
Wind: 7 mph
3 PM
Cloudy Weather
43°
Feels Like 43°
0
Humidity: 28%
UV Index: 3
Wind: 8 mph
4 PM
Cloudy Weather
43°
Feels Like 41°
0
Humidity: 27%
UV Index: 2
Wind: 8 mph
5 PM
Cloudy Weather
43°
Feels Like 39°
0
Humidity: 28%
UV Index: 2
Wind: 8 mph
6 PM
Cloudy Weather
41°
Feels Like 37°
0
Humidity: 30%
UV Index: 1
Wind: 8 mph
7 PM
Cloudy Weather
39°
Feels Like 36°
0
Humidity: 34%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Night
37°
Feels Like 36°
0
Humidity: 39%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Night
36°
Feels Like 32°
0
Humidity: 44%
UV Index: 0
Wind: 7 mph
10 PM
Cloudy Night
36°
Feels Like 30°
0
Humidity: 48%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Weather
36°
Feels Like 30°
0
Humidity: 51%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 1.05 µg/m³
  • PM10: 2.06 µg/m³
  • O3: 0.048 ppm
  • NO2: 1.3 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.12 µg/m³
  • PM10: 2.18 µg/m³
  • O3: 0.047 ppm
  • NO2: 1.3 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.2 µg/m³
  • PM10: 2.29 µg/m³
  • O3: 0.046 ppm
  • NO2: 1.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.28 µg/m³
  • PM10: 2.41 µg/m³
  • O3: 0.046 ppm
  • NO2: 1.7 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.32 µg/m³
  • PM10: 2.41 µg/m³
  • O3: 0.045 ppm
  • NO2: 2.4 ppb
  • SO2: 0.6 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.37 µg/m³
  • PM10: 2.45 µg/m³
  • O3: 0.045 ppm
  • NO2: 2.9 ppb
  • SO2: 0.7 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.49 µg/m³
  • PM10: 2.56 µg/m³
  • O3: 0.045 ppm
  • NO2: 2.8 ppb
  • SO2: 0.8 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.37 µg/m³
  • PM10: 2.15 µg/m³
  • O3: 0.048 ppm
  • NO2: 2 ppb
  • SO2: 0.8 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.36 µg/m³
  • PM10: 2.05 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.7 ppb
  • SO2: 0.7 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.52 µg/m³
  • PM10: 2.23 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.6 ppb
  • SO2: 0.7 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.7 µg/m³
  • PM10: 2.44 µg/m³
  • O3: 0.053 ppm
  • NO2: 1.5 ppb
  • SO2: 0.7 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.85 µg/m³
  • PM10: 2.59 µg/m³
  • O3: 0.054 ppm
  • NO2: 1.4 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

5 PM
52 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.92 µg/m³
  • PM10: 2.68 µg/m³
  • O3: 0.055 ppm
  • NO2: 1.5 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

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

Pollutant Concentrations:

  • PM2.5: 2.04 µg/m³
  • PM10: 2.97 µg/m³
  • O3: 0.051 ppm
  • NO2: 2.7 ppb
  • SO2: 0.6 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.42 µg/m³
  • PM10: 3.71 µg/m³
  • O3: 0.044 ppm
  • NO2: 5.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.85 µg/m³
  • PM10: 4.52 µg/m³
  • O3: 0.039 ppm
  • NO2: 7.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.36 µg/m³
  • PM10: 5.36 µg/m³
  • O3: 0.037 ppm
  • NO2: 7.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.75 µg/m³
  • PM10: 5.94 µg/m³
  • O3: 0.036 ppm
  • NO2: 7.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.12 µg/m³
  • PM10: 6.46 µg/m³
  • O3: 0.035 ppm
  • NO2: 7.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.20 ppm

Health Recommendations:

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