• Tonight

    Dec 18

    Lo 30°

    Mostly cloudy

    Hair Frizz Weather
    • Wind
      Gust
      24 mph
    • Precip
      3%
    • Hours of Precip
      0
  • Fri

    Dec 19

    43°Lo 26°

    Sunshine and patchy clouds

    Watch for hair frizz
    • Wind
      Gust
      17 mph
    • Precip
      0%
    • Hours of Precip
      0
    more
  • Sat

    Dec 20

    41°Lo 27°

    Mostly cloudy

    Watch for hair frizz
    • Wind
      Gust
      5 mph
    • Precip
      6%
    • Hours of Precip
      0
    more
  • Sun

    Dec 21

    44°Lo 30°

    Partly sunny

    Watch for hair frizz
    • Wind
      Gust
      6 mph
    • Precip
      4%
    • Hours of Precip
      0
    more
  • Mon

    Dec 22

    43°Lo 37°

    Rain

    Advisory for hair frizz
    • Wind
      Gust
      8 mph
    • Precip
      75%
    • Hours of Precip
      8.5
    more
Next Previous
Clear 34° RealFeel® 27°

N

E

S

W

  • Humidity: 59%
  • Pressure: 30.15 in ↑
  • UV Index: 0
  • Cloud Cover: 0%
  • Ceiling: 23800 ft
  • Dew Point: 21° F
  • Visibility: 10 mi
8 mph

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:22 AM with 9:26 of sunlight, then sets at 4:48 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 3:35 AM with 10:50 of moolight, then sets at 2:25 PM

Temperature Summary - 7:39 PM

  Temp (°F)
Now 34°
Yesterday 31°
RealFeel® 27°
RealFeel® Shade 27°
Wind Chill 27°
Dew Point 21°
  Hi / Lo
Previous 6 Hours 39°
  32°
Previous 12 Hours 39°
  30°
Previous 24 Hours 39°
  30°

Temperature History - Dec 18

more Historical Weather Data >
  Today Normal Record 12/18/2013
High 39° 46° 74° (2006) 44°
Low 30° 32° 10° (1926) 32°

Precipitation Summary - 7:39 PM

  Amount (in)
Previous 1 Hour 0
Previous 3 Hours 0
Previous 6 Hours 0
Previous 9 Hours 0
Previous 12 Hours 0
Previous 18 Hours 0
Previous 24 Hours 0

Rockville Weather Report

DC: Quiet Weekend Weather to be Followed by Christmas Eve Storm

December 18, 2014; 6:11 PM ET

Following benign weather this weekend, a major storm will affect Washington, D.C., much of the East and Midwest on Christmas Eve. more >

The History Behind the UV Index

Nov 12, 2012; 5:00 AM ET The UV index has been around since the early 1990s. It was created to help you plan outdoor activities in hopes to limit overexposure to the sun. Jeannette Calle has more.

Thu. Hair Frizz

Thu. Wind Maps

Thu. UV Index