• Early AM

    Dec 20

    Lo 25°

    Partly cloudy

    Migraine Headache Weather
    • Hi
      RealFeel
      32°
    • UV
      1 - Low
    • Cloud
      Cover
      18%
    more
  • Today

    Dec 20

    40°Lo 26°

    Mainly cloudy

    Beneficial weather for migraines
    • Hi
      RealFeel
      42°
    • UV
      1 - Low
    • Cloud
      Cover
      79%
    more
  • Sun

    Dec 21

    43°Lo 28°

    Partly sunny

    Beneficial weather for migraines
    • Hi
      RealFeel
      45°
    • UV
      2 - Low
    • Cloud
      Cover
      31%
  • Mon

    Dec 22

    43°Lo 38°

    Rain

    Beneficial weather for migraines
    • Hi
      RealFeel
      39°
    • UV
      1 - Low
    • Cloud
      Cover
      93%
    more
  • Tue

    Dec 23

    52°Lo 46°

    Cloudy with occasional rain

    Neutral weather for migraines
    • Hi
      RealFeel
      51°
    • UV
      1 - Low
    • Cloud
      Cover
      97%
    more
Next Previous
Hi 43° RealFeel® 45° Precipitation 4%

Day

N

E

S

W

  • E 2 mph
  • Gusts: 5 mph

Partly sunny

  • Max UV Index: 2 (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 28° RealFeel® 26° Precipitation 10%

Night

N

E

S

W

  • SE 5 mph
  • Gusts: 6 mph

Increasing amounts of clouds

  • 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 21

more Historical Weather Data >
  Today Normal Record 12/21/2013
High 43° 44° 70° (2013) 70°
Low 28° 26° (1989) 51°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:25 AM with 9:26 of sunlight, then sets at 4:51 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 6:39 AM with 10:16 of moolight, then sets at 4:55 PM

Herndon 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 >

Sun. Migraine Headache

Sun. UV Index