Hourly Weather | Today Sunday, October 26, 2025
Gaithersburg, Maryland
1 PM
Cloudy Weather
59°
Feels Like 64°
0
Humidity: 49%
Wind: 4 mph
UV Index: 3
2 PM
Cloudy Weather
61°
Feels Like 66°
0
Humidity: 45%
Wind: 4 mph
UV Index: 3
3 PM
Cloudy Weather
61°
Feels Like 66°
0
Humidity: 42%
Wind: 4 mph
UV Index: 2
4 PM
Cloudy Weather
61°
Feels Like 64°
0
Humidity: 44%
Wind: 4 mph
UV Index: 2
5 PM
Cloudy Weather
59°
Feels Like 61°
0
Humidity: 48%
Wind: 4 mph
UV Index: 1
6 PM
Cloudy Weather
57°
Feels Like 57°
0
Humidity: 52%
Wind: 4 mph
UV Index: 0
7 PM
Cloudy Night
54°
Feels Like 54°
0
Humidity: 61%
Wind: 4 mph
UV Index: 0
8 PM
Cloudy Night
52°
Feels Like 52°
0
Humidity: 68%
Wind: 4 mph
UV Index: 0
9 PM
Cloudy Night
50°
Feels Like 50°
0
Humidity: 75%
Wind: 4 mph
UV Index: 0
10 PM
Cloudy Night
48°
Feels Like 48°
0
Humidity: 80%
Wind: 4 mph
UV Index: 0
11 PM
Cloudy Night
46°
Feels Like 46°
0
Humidity: 83%
Wind: 4 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 5.19 µg/m³
  • PM10: 6.5 µg/m³
  • O3: 0.027 ppm
  • NO2: 2.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.8 µg/m³
  • PM10: 7.16 µg/m³
  • O3: 0.029 ppm
  • NO2: 2.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 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: 6.39 µg/m³
  • PM10: 7.6 µg/m³
  • O3: 0.036 ppm
  • NO2: 1.9 ppb
  • SO2: 0.6 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.58 µg/m³
  • PM10: 7.72 µg/m³
  • O3: 0.037 ppm
  • NO2: 1.7 ppb
  • SO2: 0.6 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.75 µg/m³
  • PM10: 7.92 µg/m³
  • O3: 0.037 ppm
  • NO2: 1.8 ppb
  • SO2: 0.6 ppb
  • CO: 0.12 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: 6.93 µg/m³
  • PM10: 8.19 µg/m³
  • O3: 0.033 ppm
  • NO2: 2.8 ppb
  • SO2: 0.5 ppb
  • CO: 0.13 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.18 µg/m³
  • PM10: 8.59 µg/m³
  • O3: 0.026 ppm
  • NO2: 4.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.44 µg/m³
  • PM10: 9.01 µg/m³
  • O3: 0.021 ppm
  • NO2: 5.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.56 µg/m³
  • PM10: 9.27 µg/m³
  • O3: 0.018 ppm
  • NO2: 6.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.65 µg/m³
  • PM10: 9.49 µg/m³
  • O3: 0.016 ppm
  • NO2: 7.1 ppb
  • SO2: 0.1 ppb
  • CO: 0.17 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.68 µg/m³
  • PM10: 9.59 µg/m³
  • O3: 0.015 ppm
  • NO2: 7.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.17 ppm

Health Recommendations:

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