• Tonight

    Feb 11

    Lo 11°

    Partly cloudy and cold

    Migraine Headache Weather
    • Hi
      RealFeel
      14°
    • UV
      4 - Moderate
    • Cloud
      Cover
      52%
  • Fri

    Feb 12

    31°Lo 17°

    Some sun, then clouds; cold

    Beneficial weather for migraines
    • Hi
      RealFeel
      26°
    • UV
      4 - Moderate
    • Cloud
      Cover
      68%
    more
  • Sat

    Feb 13

    22°Lo 6°

    Windy and very cold

    Neutral weather for migraines
    • Hi
      RealFeel
    • UV
      2 - Low
    • Cloud
      Cover
      70%
    more
  • Sun

    Feb 14

    24°Lo 11°

    Sunny, but very cold

    Beneficial weather for migraines
    • Hi
      RealFeel
      20°
    • UV
      4 - Moderate
    • Cloud
      Cover
      8%
    more
  • Mon

    Feb 15

    32°Lo 27°

    A little afternoon snow

    Beneficial weather for migraines
    • Hi
      RealFeel
      24°
    • UV
      2 - Low
    • Cloud
      Cover
      99%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Thu
1pm
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  1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm
Forecast
Partly Cloudy
Partly Cloudy
Partly Sunny
Partly Cloudy
Partly Sunny
Partly Cloudy
Mostly Clear
Partly Cloudy
Temp (°F) 26° 28° 28° 27° 26° 24° 22° 21°
RealFeel® 14° 14° 13° 11°
Humidity 32% 29% 30% 29% 32% 36% 36% 39%
   
  1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm
Rain
 
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0%
Snow
 
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Ice
 
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  1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm
Wind (mph) 15 NW 17 WNW 17 WNW 17 WNW 16 WNW 15 WNW 15 NW 16 NW
UV Index 2 2 1 0 0 0 0 0
Cloud Cover 66% 57% 49% 57% 30% 36% 26% 35%
Dew Point -1° -1° -1° -1°
Middle Grid line 30 F Middle Grid line 25 F Middle Grid line 20 F

Temperature History - Feb 11

more Historical Weather Data >
  Today Normal Record 2/11/2015
High 28° 45° 71° (2009) 45°
Low 11° 25° -7° (1979) 25°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:06 AM with 10:36 of sunlight, then sets at 5:42 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:56 AM with 12:34 of moolight, then sets at 9:30 PM

Herndon Weather Report

DC, Baltimore: Polar vortex to smack region during Valentine's Day weekend

February 11, 2016; 8:58 AM ET

The coldest air of the winter and perhaps during all of last winter will plunge across the Washington, D.C., and Baltimore areas during Valentine's Day weekend. more >

Thu. Migraine Headache

Thu. UV Index