Hourly Weather | Today Tuesday, July 21, 2026
Rockville, Maryland
5 AM
Cloudy Weather
73°
Feels Like 77°
36
Humidity: 94%
UV Index: 0
Wind: 6 mph
6 AM
Cloudy Weather
73°
Feels Like 77°
31
Humidity: 95%
UV Index: 0
Wind: 6 mph
7 AM
Cloudy Weather
73°
Feels Like 79°
27
Humidity: 98%
UV Index: 0
Wind: 6 mph
8 AM
Cloudy Weather
73°
Feels Like 81°
20
Humidity: 96%
UV Index: 1
Wind: 6 mph
9 AM
Cloudy Weather
77°
Feels Like 84°
20
Humidity: 90%
UV Index: 1
Wind: 7 mph
10 AM
Cloudy Weather
79°
Feels Like 88°
20
Humidity: 85%
UV Index: 1
Wind: 7 mph
11 AM
Cloudy Weather
81°
Feels Like 90°
20
Humidity: 80%
UV Index: 2
Wind: 8 mph
12 PM
Cloudy Weather
82°
Feels Like 93°
20
Humidity: 75%
UV Index: 3
Wind: 8 mph
1 PM
Cloudy Weather
84°
Feels Like 95°
25
Humidity: 68%
UV Index: 4
Wind: 9 mph
2 PM
Cloudy Weather
88°
Feels Like 97°
49
Humidity: 63%
UV Index: 4
Wind: 9 mph
3 PM
Cloudy Weather
86°
Feels Like 95°
49
Humidity: 66%
UV Index: 3
Wind: 9 mph
4 PM
Stormy Weather
84°
Feels Like 90°
66
Humidity: 79%
UV Index: 1
Wind: 9 mph
5 PM
Stormy Weather
81°
Feels Like 82°
56
Humidity: 80%
UV Index: 1
Wind: 9 mph
6 PM
Cloudy Weather
81°
Feels Like 88°
49
Humidity: 85%
UV Index: 1
Wind: 9 mph
7 PM
Cloudy Weather
81°
Feels Like 86°
49
Humidity: 83%
UV Index: 0
Wind: 9 mph
8 PM
Stormy Weather
79°
Feels Like 81°
70
Humidity: 86%
UV Index: 0
Wind: 9 mph
9 PM
Stormy Weather
77°
Feels Like 82°
61
Humidity: 90%
UV Index: 0
Wind: 8 mph
10 PM
Cloudy Weather
75°
Feels Like 81°
49
Humidity: 95%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Weather
75°
Feels Like 81°
34
Humidity: 95%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 6.36 µg/m³
  • PM10: 6.78 µg/m³
  • O3: 0.017 ppm
  • NO2: 1.4 ppb
  • SO2: 0.3 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.99 µg/m³
  • PM10: 6.36 µg/m³
  • O3: 0.015 ppm
  • NO2: 1.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.69 µg/m³
  • PM10: 6.04 µg/m³
  • O3: 0.014 ppm
  • NO2: 1.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.45 µg/m³
  • PM10: 5.79 µg/m³
  • O3: 0.015 ppm
  • NO2: 1.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.16 µg/m³
  • PM10: 5.49 µg/m³
  • O3: 0.017 ppm
  • NO2: 1.8 ppb
  • SO2: 0.4 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.83 µg/m³
  • PM10: 5.15 µg/m³
  • O3: 0.019 ppm
  • NO2: 1.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 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: 4.62 µg/m³
  • PM10: 4.94 µg/m³
  • O3: 0.023 ppm
  • NO2: 1.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4 µg/m³
  • PM10: 4.27 µg/m³
  • O3: 0.030 ppm
  • NO2: 1 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.37 µg/m³
  • PM10: 3.58 µg/m³
  • O3: 0.033 ppm
  • NO2: 0.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.01 µg/m³
  • PM10: 3.19 µg/m³
  • O3: 0.034 ppm
  • NO2: 0.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.81 µg/m³
  • PM10: 2.95 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.78 µg/m³
  • PM10: 2.87 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 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: 2.64 µg/m³
  • PM10: 2.72 µg/m³
  • O3: 0.035 ppm
  • NO2: 1 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 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: 2.43 µg/m³
  • O3: 0.034 ppm
  • NO2: 1.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.16 µg/m³
  • PM10: 2.23 µg/m³
  • O3: 0.033 ppm
  • NO2: 1.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.08 µg/m³
  • PM10: 2.15 µg/m³
  • O3: 0.032 ppm
  • NO2: 1.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.06 µg/m³
  • PM10: 2.12 µg/m³
  • O3: 0.030 ppm
  • NO2: 1.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 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: 2.04 µg/m³
  • PM10: 2.1 µg/m³
  • O3: 0.027 ppm
  • NO2: 1.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.96 µg/m³
  • PM10: 2.02 µg/m³
  • O3: 0.025 ppm
  • NO2: 1.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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