Hourly Weather | Today Thursday, February 26, 2026
Frederick, Maryland
7 AM
Cloudy Weather
37°
Feels Like 36°
25
Humidity: 67%
UV Index: 0
Wind: 6 mph
8 AM
Cloudy Weather
39°
Feels Like 37°
25
Humidity: 64%
UV Index: 1
Wind: 6 mph
9 AM
Cloudy Weather
41°
Feels Like 39°
31
Humidity: 61%
UV Index: 1
Wind: 6 mph
10 AM
Rainy Weather
43°
Feels Like 39°
70
Humidity: 59%
UV Index: 1
Wind: 6 mph
11 AM
Rainy Weather
45°
Feels Like 41°
70
Humidity: 56%
UV Index: 1
Wind: 6 mph
12 PM
Rainy Weather
45°
Feels Like 43°
70
Humidity: 55%
UV Index: 1
Wind: 6 mph
1 PM
Rainy Weather
46°
Feels Like 43°
65
Humidity: 55%
UV Index: 1
Wind: 5 mph
2 PM
Rainy Weather
46°
Feels Like 45°
66
Humidity: 55%
UV Index: 1
Wind: 5 mph
3 PM
Cloudy Weather
45°
Feels Like 45°
49
Humidity: 58%
UV Index: 1
Wind: 5 mph
4 PM
Cloudy Weather
45°
Feels Like 45°
49
Humidity: 60%
UV Index: 0
Wind: 5 mph
5 PM
Rainy Weather
43°
Feels Like 39°
56
Humidity: 66%
UV Index: 0
Wind: 5 mph
6 PM
Cloudy Weather
43°
Feels Like 41°
49
Humidity: 71%
UV Index: 0
Wind: 5 mph
7 PM
Cloudy Weather
39°
Feels Like 39°
20
Humidity: 76%
UV Index: 0
Wind: 5 mph
8 PM
Cloudy Night
37°
Feels Like 36°
20
Humidity: 81%
UV Index: 0
Wind: 5 mph
9 PM
Cloudy Night
36°
Feels Like 36°
20
Humidity: 81%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
36°
Feels Like 36°
20
Humidity: 80%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
34°
Feels Like 34°
20
Humidity: 82%
UV Index: 0
Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 4.34 µg/m³
  • PM10: 6.8 µg/m³
  • O3: 0.034 ppm
  • NO2: 2.3 ppb
  • SO2: 0 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

8 AM
27 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.79 µg/m³
  • PM10: 7.86 µg/m³
  • O3: 0.030 ppm
  • NO2: 3.8 ppb
  • SO2: 0 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

9 AM
24 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.36 µg/m³
  • PM10: 8.73 µg/m³
  • O3: 0.026 ppm
  • NO2: 5.1 ppb
  • SO2: 0 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.07 µg/m³
  • PM10: 9.46 µg/m³
  • O3: 0.025 ppm
  • NO2: 5.3 ppb
  • SO2: 0 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

11 AM
34 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.82 µg/m³
  • PM10: 8.81 µg/m³
  • O3: 0.037 ppm
  • NO2: 3.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.38 µg/m³
  • PM10: 9.32 µg/m³
  • O3: 0.037 ppm
  • NO2: 3.6 ppb
  • SO2: 0.5 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

1 PM
34 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.14 µg/m³
  • PM10: 10.18 µg/m³
  • O3: 0.037 ppm
  • NO2: 4.4 ppb
  • SO2: 0.6 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.53 µg/m³
  • PM10: 10.47 µg/m³
  • O3: 0.041 ppm
  • NO2: 4.4 ppb
  • SO2: 0.8 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.76 µg/m³
  • PM10: 10.67 µg/m³
  • O3: 0.041 ppm
  • NO2: 4.9 ppb
  • SO2: 0.8 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

4 PM
39 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.33 µg/m³
  • PM10: 11.33 µg/m³
  • O3: 0.041 ppm
  • NO2: 5.7 ppb
  • SO2: 0.8 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.23 µg/m³
  • PM10: 12.64 µg/m³
  • O3: 0.037 ppm
  • NO2: 7.3 ppb
  • SO2: 0.7 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

6 PM
46 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.06 µg/m³
  • PM10: 14.18 µg/m³
  • O3: 0.033 ppm
  • NO2: 9.7 ppb
  • SO2: 0.6 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

7 PM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.29 µg/m³
  • PM10: 16.21 µg/m³
  • O3: 0.030 ppm
  • NO2: 11.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

8 PM
54 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.9 µg/m³
  • PM10: 18.64 µg/m³
  • O3: 0.027 ppm
  • NO2: 11.9 ppb
  • SO2: 0.6 ppb
  • CO: 0.27 ppm

Health Recommendations:

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

9 PM
58 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 15.84 µg/m³
  • PM10: 21.3 µg/m³
  • O3: 0.025 ppm
  • NO2: 12.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.28 ppm

Health Recommendations:

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

10 PM
62 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 17.85 µg/m³
  • PM10: 23.93 µg/m³
  • O3: 0.024 ppm
  • NO2: 12.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.29 ppm

Health Recommendations:

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

11 PM
66 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 19.44 µg/m³
  • PM10: 25.88 µg/m³
  • O3: 0.022 ppm
  • NO2: 12.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.29 ppm

Health Recommendations:

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