Hourly Weather | Today Wednesday, May 20, 2026
Frederick, Maryland
10 PM
Stormy Weather
72°
Feels Like 70°
67
Humidity: 90%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Weather
72°
Feels Like 72°
49
Humidity: 87%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 1.8 µg/m³
  • PM10: 2.18 µg/m³
  • O3: 0.027 ppm
  • NO2: 1.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.45 µg/m³
  • PM10: 2.81 µg/m³
  • O3: 0.023 ppm
  • NO2: 1.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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