• Tonight

    Apr 20

    Lo 32°

    Clear and chilly

    Asthma Weather
    • Hi
      RealFeel
      70°
    • UV
      7 - High
    • Air Qual.
      Good
  • Mon

    Apr 21

    74°Lo 44°

    Mostly sunny and pleasant

    Beneficial weather for asthma
    • Hi
      RealFeel
      78°
    • UV
      7 - High
    • Air Qual.
      Moderate
    more
  • Tue

    Apr 22

    72°Lo 44°

    An afternoon t-storm or two

    At High Risk weather for asthma
    • Hi
      RealFeel
      71°
    • UV
      3 - Moderate
    • Air Qual.
      Moderate
    more
  • Wed

    Apr 23

    63°Lo 36°

    Partly sunny and breezy

    Beneficial weather for asthma
    • Hi
      RealFeel
      62°
    • UV
      7 - High
    • Cloud
      Cover
      26%
    more
  • Thu

    Apr 24

    69°Lo 49°

    A full day of sunshine

    Beneficial weather for asthma
    • Hi
      RealFeel
      74°
    • UV
      7 - High
    • Cloud
      Cover
      9%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sun
10pm
11pm Mon
12am
1am 2am 3am 4am 5am
  10pm 11pm 12am 1am 2am 3am 4am 5am
Forecast
Clear
Clear
Clear
Clear
Clear
Clear
Mostly Clear
Mostly Clear
Temp (°F) 49° 46° 42° 40° 38° 34° 32° 33°
RealFeel® 48° 45° 42° 41° 40° 35° 33° 34°
Humidity 63% 69% 74% 81% 86% 91% 92% 92%
   
  10pm 11pm 12am 1am 2am 3am 4am 5am
Rain
 
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0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
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0%
 
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Ice
 
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  10pm 11pm 12am 1am 2am 3am 4am 5am
Wind (mph) 3 SE 2 SE 2 SE 1 SE 1 ESE 1 E 1 NNE 1 NNE
UV Index 0 0 0 0 0 0 0 0
Cloud Cover 0% 3% 5% 8% 8% 8% 10% 10%
Dew Point 37° 36° 34° 34° 34° 31° 30° 31°
Middle Grid line 50 F Middle Grid line 45 F Middle Grid line 40 F Middle Grid line 35 F Middle Grid line 30 F

Temperature History - Apr 20

more Historical Weather Data >
  Today Normal Record 4/20/2013
High 64° 70° N/A 57°
Low 32° 46° N/A 37°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:26 AM with 13:26 of sunlight, then sets at 7:52 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 12:30 AM with 10:14 of moolight, then sets at 10:44 AM

Top Story

Frederick Weather Report

DC: Temperatures to Remain on a Roller Coaster Ride

April 20, 2014; 8:25 PM ET

Temperatures will remain on the spring roller coaster ride this week in Washington, D.C. more >

Is it a Cold or the Flu?

Apr 19, 2014; 5:00 AM ET Symptoms caused by the common cold can often resemble those associated with the influenza virus, so how do you differentiate between the two?

Sun. Air Quality

Sun. Asthma Risk

Sun. UV Index