Hourly Weather | Today Monday, September 21, 2026
Rockville, Maryland
3 PM
Stormy Weather
73°
Feels Like 70°
75
Humidity: 69%
UV Index: 1
Wind: 7 mph
4 PM
Cloudy Weather
72°
Feels Like 72°
49
Humidity: 74%
UV Index: 1
Wind: 7 mph
5 PM
Cloudy Weather
70°
Feels Like 70°
49
Humidity: 80%
UV Index: 0
Wind: 7 mph
6 PM
Cloudy Weather
68°
Feels Like 66°
49
Humidity: 85%
UV Index: 0
Wind: 7 mph
7 PM
Stormy Weather
66°
Feels Like 63°
66
Humidity: 85%
UV Index: 0
Wind: 7 mph
8 PM
Rainy Weather
66°
Feels Like 63°
62
Humidity: 86%
UV Index: 0
Wind: 6 mph
9 PM
Rainy Weather
64°
Feels Like 61°
62
Humidity: 91%
UV Index: 0
Wind: 7 mph
10 PM
Cloudy Weather
64°
Feels Like 64°
49
Humidity: 92%
UV Index: 0
Wind: 7 mph
11 PM
Rainy Weather
64°
Feels Like 61°
59
Humidity: 93%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 4.98 µg/m³
  • PM10: 5.74 µg/m³
  • O3: 0.028 ppm
  • NO2: 2.8 ppb
  • SO2: 0.7 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.5 µg/m³
  • PM10: 6.27 µg/m³
  • O3: 0.030 ppm
  • NO2: 2.8 ppb
  • SO2: 0.7 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.96 µg/m³
  • PM10: 6.75 µg/m³
  • O3: 0.031 ppm
  • NO2: 2.9 ppb
  • SO2: 0.7 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.44 µg/m³
  • PM10: 7.21 µg/m³
  • O3: 0.032 ppm
  • NO2: 3.1 ppb
  • SO2: 0.7 ppb
  • CO: 0.19 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: 6.81 µg/m³
  • PM10: 7.57 µg/m³
  • O3: 0.032 ppm
  • NO2: 3.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.11 µg/m³
  • PM10: 7.9 µg/m³
  • O3: 0.032 ppm
  • NO2: 3.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

9 PM
30 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.17 µg/m³
  • PM10: 7.97 µg/m³
  • O3: 0.032 ppm
  • NO2: 2.9 ppb
  • SO2: 0.6 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

10 PM
29 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.02 µg/m³
  • PM10: 7.88 µg/m³
  • O3: 0.031 ppm
  • NO2: 2.8 ppb
  • SO2: 0.6 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

11 PM
28 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.6 µg/m³
  • PM10: 7.6 µg/m³
  • O3: 0.030 ppm
  • NO2: 2.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.19 ppm

Health Recommendations:

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