• Today

    Dec 18

    42°Lo 30°

    Colder with sun and clouds

    Snow Days Weather
    • Snow
      1%
    • Ice
      0%
    • Snow
      0 in
  • Fri

    Dec 19

    44°Lo 26°

    Sunshine and patchy clouds

    Snow Days Weather
    • Snow
      0%
    • Ice
      0%
    • Snow
      0 in
    more
  • Sat

    Dec 20

    42°Lo 27°

    Mainly cloudy

    Snow Days Weather
    • Snow
      3%
    • Ice
      0%
    • Snow
      0 in
    more
  • Sun

    Dec 21

    45°Lo 30°

    Partly sunny

    Snow Days Weather
    • Snow
      1%
    • Ice
      0%
    • Snow
      0 in
    more
  • Mon

    Dec 22

    44°Lo 38°

    Rain

    Snow Days Weather
    • Snow
      11%
    • Ice
      0%
    • Snow
      0 in
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Thu
4pm
5pm 6pm 7pm 8pm 9pm 10pm 11pm
  4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm
Forecast
Partly Sunny
Partly Cloudy
Partly Cloudy
Cloudy
Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Temp (°F) 42° 40° 39° 37° 36° 36° 35° 34°
RealFeel® 33° 31° 30° 30° 30° 32° 32° 31°
Humidity 44% 47% 52% 55% 58% 59% 60% 62%
   
  4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm
Wind (mph) 12 NW 12 NW 10 NW 8 NW 7 NW 6 NW 6 NW 6 NW
UV Index 0 0 0 0 0 0 0 0
Cloud Cover 44% 37% 40% 71% 74% 84% 86% 84%
Dew Point 21° 22° 22° 22° 22° 23° 22° 22°
Middle Grid line 45 F Middle Grid line 40 F Middle Grid line 35 F Middle Grid line 30 F

Temperature History - Dec 18

more Historical Weather Data >
  Today Normal Record 12/18/2013
High 42° 46° 74° (2006) 44°
Low 30° 32° 10° (1926) 32°

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 3:34 AM with 10:51 of moolight, then sets at 2:25 PM

Arlington Weather Report

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

December 18, 2014; 1:11 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 540 Snow Line

Dec 20, 2012; 5:00 AM ET The 540 line is often used by meteorologists to determine the chances of rain vs. snow.

48 Hour Precipitation Forecast

Thu. Snow Day Potential