• Tonight

    Apr 18

    Lo 41°

    Clouds breaking

    Asthma Weather
    • Hi
      RealFeel
      61°
    • UV
      6 - High
    • Air Qual.
      Good
  • Sat

    Apr 19

    65°Lo 40°

    Partly sunny

    Beneficial weather for asthma
    • Hi
      RealFeel
      65°
    • UV
      7 - High
    • Air Qual.
      Good
    more
  • Sun

    Apr 20

    65°Lo 38°

    Mostly sunny

    Beneficial weather for asthma
    • Hi
      RealFeel
      71°
    • UV
      7 - High
    • Air Qual.
      Good
    more
  • Mon

    Apr 21

    70°Lo 48°

    Partly sunny and nice

    Beneficial weather for asthma
    • Hi
      RealFeel
      73°
    • UV
      6 - High
    • Cloud
      Cover
      51%
    more
  • Tue

    Apr 22

    71°Lo 49°

    An afternoon t-storm or two

    At Risk weather for asthma
    • Hi
      RealFeel
      71°
    • UV
      5 - Moderate
    • Cloud
      Cover
      77%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Fri
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Forecast
Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Partly Cloudy
Temp (°F) 55° 53° 50° 48° 46° 44° 44° 43°
RealFeel® 53° 52° 49° 48° 46° 44° 44° 44°
Humidity 46% 52% 60% 67% 74% 79% 83% 86%
   
  7pm 8pm 9pm 10pm 11pm 12am 1am 2am
Rain
 
0%
 
1%
 
1%
 
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2%
Snow
 
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Ice
 
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  7pm 8pm 9pm 10pm 11pm 12am 1am 2am
Wind (mph) 4 SE 3 SE 3 SE 2 SE 2 SE 2 SSE 2 S 2 SSW
UV Index 0 0 0 0 0 0 0 0
Cloud Cover 91% 76% 78% 80% 79% 78% 76% 45%
Dew Point 34° 36° 37° 38° 38° 38° 39° 40°
Middle Grid line 60 F Middle Grid line 55 F Middle Grid line 50 F Middle Grid line 45 F Middle Grid line 40 F

Temperature History - Apr 18

more Historical Weather Data >
  Today Normal Record 4/18/2013
High 57° 68° 95° (1976) 78°
Low 41° 48° 25° (1875) 61°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:28 AM with 13:21 of sunlight, then sets at 7:49 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 11:31 PM with 10:13 of moolight, then sets at 9:44 AM

Top Story

Rockville Weather Report

DC: Turn to Milder Weather for Easter Weekend

April 18, 2014; 4:45 PM ET

The recent stretch of cool weather in Washington, D.C., will depart for Easter weekend. more >

Is it a Cold or the Flu?

Apr 7, 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?

Fri. Air Quality

Fri. Asthma Risk

Fri. UV Index