Hourly Weather | Today Tuesday, September 1, 2026
Rockville, Maryland
12 PM
Rainy Weather
86°
Feels Like 91°
40
Humidity: 61%
UV Index: 3
Wind: 7 mph
1 PM
Cloudy Weather
88°
Feels Like 99°
37
Humidity: 56%
UV Index: 7
Wind: 8 mph
2 PM
Cloudy Weather
90°
Feels Like 99°
34
Humidity: 53%
UV Index: 7
Wind: 8 mph
3 PM
Cloudy Weather
91°
Feels Like 99°
34
Humidity: 51%
UV Index: 5
Wind: 8 mph
4 PM
Cloudy Weather
91°
Feels Like 99°
40
Humidity: 48%
UV Index: 4
Wind: 8 mph
5 PM
Sunny with a Chance of Thunderstorms
90°
Feels Like 95°
55
Humidity: 62%
UV Index: 2
Wind: 8 mph
6 PM
Cloudy Weather
88°
Feels Like 91°
49
Humidity: 58%
UV Index: 1
Wind: 8 mph
7 PM
Cloudy Weather
84°
Feels Like 90°
38
Humidity: 62%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Night
84°
Feels Like 90°
19
Humidity: 69%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
81°
Feels Like 88°
19
Humidity: 76%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
79°
Feels Like 84°
19
Humidity: 83%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Night
77°
Feels Like 82°
19
Humidity: 88%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 7.7 µg/m³
  • PM10: 8.21 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.5 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
55 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.83 µg/m³
  • PM10: 7.22 µg/m³
  • O3: 0.056 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

2 PM
53 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.63 µg/m³
  • PM10: 5.97 µg/m³
  • O3: 0.055 ppm
  • NO2: 0.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

3 PM
51 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.63 µg/m³
  • PM10: 4.93 µg/m³
  • O3: 0.054 ppm
  • NO2: 0.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.09 µg/m³
  • PM10: 4.37 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.82 µg/m³
  • PM10: 4.1 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 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: 3.85 µg/m³
  • PM10: 4.24 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.03 µg/m³
  • PM10: 4.64 µg/m³
  • O3: 0.031 ppm
  • NO2: 3.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.17 µg/m³
  • PM10: 5.04 µg/m³
  • O3: 0.024 ppm
  • NO2: 4.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.27 µg/m³
  • PM10: 5.36 µg/m³
  • O3: 0.021 ppm
  • NO2: 4.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.35 µg/m³
  • PM10: 5.62 µg/m³
  • O3: 0.017 ppm
  • NO2: 4.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.34 µg/m³
  • PM10: 5.72 µg/m³
  • O3: 0.015 ppm
  • NO2: 4.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.13 ppm

Health Recommendations:

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