Hourly Weather | Today Wednesday, March 18, 2026
Waldorf, Maryland
10 AM
Cloudy Weather
32°
Feels Like 34°
0
Humidity: 47%
UV Index: 2
Wind: 6 mph
11 AM
Cloudy Weather
36°
Feels Like 43°
0
Humidity: 39%
UV Index: 4
Wind: 5 mph
12 PM
Cloudy Weather
37°
Feels Like 43°
0
Humidity: 34%
UV Index: 4
Wind: 6 mph
1 PM
Cloudy Weather
39°
Feels Like 43°
0
Humidity: 32%
UV Index: 4
Wind: 7 mph
2 PM
Cloudy Weather
39°
Feels Like 43°
0
Humidity: 30%
UV Index: 4
Wind: 8 mph
3 PM
Cloudy Weather
41°
Feels Like 43°
0
Humidity: 28%
UV Index: 3
Wind: 7 mph
4 PM
Cloudy Weather
43°
Feels Like 43°
0
Humidity: 27%
UV Index: 2
Wind: 7 mph
5 PM
Cloudy Weather
41°
Feels Like 39°
0
Humidity: 29%
UV Index: 2
Wind: 7 mph
6 PM
Cloudy Weather
39°
Feels Like 37°
0
Humidity: 31%
UV Index: 1
Wind: 7 mph
7 PM
Cloudy Weather
37°
Feels Like 34°
0
Humidity: 36%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Night
36°
Feels Like 30°
0
Humidity: 43%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Night
34°
Feels Like 28°
0
Humidity: 49%
UV Index: 0
Wind: 7 mph
10 PM
Cloudy Night
32°
Feels Like 28°
0
Humidity: 53%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Weather
30°
Feels Like 27°
0
Humidity: 58%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 1.49 µg/m³
  • PM10: 2.57 µg/m³
  • O3: 0.045 ppm
  • NO2: 3.3 ppb
  • SO2: 0.9 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: 1.54 µg/m³
  • PM10: 2.63 µg/m³
  • O3: 0.046 ppm
  • NO2: 3.1 ppb
  • SO2: 1 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: 1.43 µg/m³
  • PM10: 2.35 µg/m³
  • O3: 0.048 ppm
  • NO2: 2.3 ppb
  • SO2: 0.9 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: 1.46 µg/m³
  • PM10: 2.32 µg/m³
  • O3: 0.050 ppm
  • NO2: 2 ppb
  • SO2: 0.9 ppb
  • CO: 0.15 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: 1.64 µg/m³
  • PM10: 2.52 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.9 ppb
  • SO2: 0.9 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.85 µg/m³
  • PM10: 2.73 µg/m³
  • O3: 0.052 ppm
  • NO2: 1.7 ppb
  • SO2: 0.8 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: 2.04 µg/m³
  • PM10: 2.92 µg/m³
  • O3: 0.054 ppm
  • NO2: 1.6 ppb
  • SO2: 0.8 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: 2.22 µg/m³
  • PM10: 3.11 µg/m³
  • O3: 0.054 ppm
  • NO2: 1.7 ppb
  • SO2: 0.8 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
47 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.39 µg/m³
  • PM10: 3.51 µg/m³
  • O3: 0.050 ppm
  • NO2: 3.3 ppb
  • SO2: 0.7 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.82 µg/m³
  • PM10: 4.37 µg/m³
  • O3: 0.042 ppm
  • NO2: 7 ppb
  • SO2: 0.5 ppb
  • CO: 0.18 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.43 µg/m³
  • PM10: 5.46 µg/m³
  • O3: 0.036 ppm
  • NO2: 9.6 ppb
  • SO2: 0.5 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.07 µg/m³
  • PM10: 6.52 µg/m³
  • O3: 0.034 ppm
  • NO2: 10.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.21 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: 4.58 µg/m³
  • PM10: 7.23 µg/m³
  • O3: 0.033 ppm
  • NO2: 9.9 ppb
  • SO2: 0.4 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.95 µg/m³
  • PM10: 7.64 µg/m³
  • O3: 0.033 ppm
  • NO2: 8.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.21 ppm

Health Recommendations:

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