Hourly Weather | Today Tuesday, April 7, 2026
Active Weather Warnings
Frederick, Maryland
3 PM
Cloudy Weather
54°
Feels Like 48°
0
Humidity: 26%
UV Index: 5
Wind: 20 mph
4 PM
Cloudy Weather
54°
Feels Like 46°
0
Humidity: 25%
UV Index: 4
Wind: 20 mph
5 PM
Cloudy Weather
52°
Feels Like 45°
0
Humidity: 26%
UV Index: 2
Wind: 18 mph
6 PM
Cloudy Weather
50°
Feels Like 43°
0
Humidity: 28%
UV Index: 1
Wind: 16 mph
7 PM
Cloudy Weather
48°
Feels Like 39°
0
Humidity: 31%
UV Index: 0
Wind: 14 mph
8 PM
Night
46°
Feels Like 43°
0
Humidity: 37%
UV Index: 0
Wind: 7 mph
9 PM
Night
45°
Feels Like 39°
0
Humidity: 42%
UV Index: 0
Wind: 7 mph
10 PM
Night
41°
Feels Like 37°
0
Humidity: 47%
UV Index: 0
Wind: 7 mph
11 PM
Night
37°
Feels Like 34°
0
Humidity: 51%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 1.34 µg/m³
  • PM10: 1.8 µg/m³
  • O3: 0.063 ppm
  • NO2: 0.4 ppb
  • SO2: 0.6 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

4 PM
79 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.51 µg/m³
  • PM10: 1.98 µg/m³
  • O3: 0.063 ppm
  • NO2: 0.4 ppb
  • SO2: 0.6 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

5 PM
79 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.67 µg/m³
  • PM10: 2.15 µg/m³
  • O3: 0.063 ppm
  • NO2: 0.5 ppb
  • SO2: 0.6 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

6 PM
76 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.91 µg/m³
  • PM10: 2.46 µg/m³
  • O3: 0.062 ppm
  • NO2: 0.6 ppb
  • SO2: 0.6 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

7 PM
70 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.11 µg/m³
  • PM10: 2.81 µg/m³
  • O3: 0.060 ppm
  • NO2: 1 ppb
  • SO2: 0.6 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

8 PM
63 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.14 µg/m³
  • PM10: 2.96 µg/m³
  • O3: 0.058 ppm
  • NO2: 1.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

9 PM
55 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.01 µg/m³
  • PM10: 2.88 µg/m³
  • O3: 0.056 ppm
  • NO2: 1.4 ppb
  • SO2: 0.6 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.88 µg/m³
  • PM10: 2.81 µg/m³
  • O3: 0.054 ppm
  • NO2: 1.5 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.81 µg/m³
  • PM10: 2.79 µg/m³
  • O3: 0.053 ppm
  • NO2: 1.6 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

Weather Alerts and Warnings for Frederick

Moderate Expected Observed

Special Weather Statement

Special Weather Statement issued April 7 at 8:37AM EDT by NWS Baltimore MD/Washington DC
Apr 7, 8:37 AM Apr 7, 7:00 PM
The combination of drying 10 hour fuels, minimum relative
humidity around 15 to 30 percent, and northwesterly wind gusts
around 20 to 35 mph will lead to an increased risk for the rapid
spread of wildfires today, especially in the afternoon to early
evening.

Residents and visitors are urged to properly dispose of cigarette
butts, matches, and any other flammable items in appropriate
containers. Additionally, exercise caution if operating any
equipment that could create sparks and keep vehicles off of dry
grass. Most dry grasses, dead leaves, and other tree litter could
easily ignite and spread fire quickly.

Lastly, remember to obey local burn bans. For more information about
wildfire danger, burn restrictions, and wildfire prevention and
education, please visit your state forestry or environmental
protection website.

For West Virginia, visit www.wvforestry.com...
For Maryland, visit dnr.maryland.gov...
For Virginia, visit dof.virginia.gov...
Updated: Apr 7, 1:49 PM Source: NWS Alert