• Early AM

    Dec 20

    Lo 27°

    Partly cloudy

    Hair Frizz Weather
    • Wind
      Gust
      14 mph
    • Precip
      1%
    • Hours of Precip
      0
    more
  • Today

    Dec 20

    40°Lo 25°

    Mostly cloudy

    Watch for hair frizz
    • Wind
      Gust
      5 mph
    • Precip
      4%
    • Hours of Precip
      0
  • Sun

    Dec 21

    44°Lo 29°

    Partly sunny

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

    Dec 22

    43°Lo 39°

    Cloudy, afternoon rain

    Advisory for hair frizz
    • Wind
      Gust
      12 mph
    • Precip
      90%
    • Hours of Precip
      9
    more
  • Tue

    Dec 23

    54°Lo 47°

    Cloudy with a bit of rain

    Advisory for hair frizz
    • Wind
      Gust
      9 mph
    • Precip
      55%
    • Hours of Precip
      6
    more
Next Previous
Hi 40° RealFeel® 42° Precipitation 4%

Day

N

E

S

W

  • NNW 2 mph
  • Gusts: 5 mph

Mostly cloudy

  • Max UV Index: 1 (Low)
  • Thunderstorms: 0%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 25° RealFeel® 28° Precipitation 9%

Night

N

E

S

W

  • N 1 mph
  • Gusts: 2 mph

Partly cloudy

  • Max UV Index: N/A
  • Thunderstorms: 0%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Dec 20

more Historical Weather Data >
  Today Normal Record 12/20/2013
High 40° 45° 66° (1889) 60°
Low 25° 31° (1942) 44°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:24 AM with 9:25 of sunlight, then sets at 4:49 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 5:38 AM with 10:20 of moolight, then sets at 3:58 PM

Rockville Weather Report

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

December 19, 2014; 2:11 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.

Sat. Hair Frizz

Sat. Wind Maps

Sat. UV Index