• Tonight

    May 27

    Lo 67°

    Partly cloudy and mild

    Migraine Headache Weather
    • Hi
      RealFeel
      98°
    • UV
      7 - Very High
    • Cloud
      Cover
      33%
  • Sat

    May 28

    88°Lo 63°

    Partly sunny, warm and muggy

    Beneficial weather for migraines
    • Hi
      RealFeel
      92°
    • UV
      5 - High
    • Cloud
      Cover
      49%
    more
  • Sun

    May 29

    79°Lo 66°

    A couple of p.m. t-storms

    Beneficial weather for migraines
    • Hi
      RealFeel
      85°
    • UV
      4 - Moderate
    • Cloud
      Cover
      76%
    more
  • Mon

    May 30

    78°Lo 63°

    Heavy rain and a thunderstorm

    Beneficial weather for migraines
    • Hi
      RealFeel
      85°
    • UV
      4 - Moderate
    • Cloud
      Cover
      94%
    more
  • Tue

    May 31

    85°Lo 60°

    Sunshine and patchy clouds

    Beneficial weather for migraines
    • Hi
      RealFeel
      93°
    • UV
      7 - Very High
    • Cloud
      Cover
      20%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Fri
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Forecast
Cloudy
Cloudy
Cloudy
Partly Cloudy
Mostly Clear
Mostly Clear
Clear
Mostly Clear
Temp (°F) 77° 75° 74° 73° 72° 70° 69° 69°
RealFeel® 77° 75° 73° 72° 71° 69° 68° 68°
Humidity 68% 70% 71% 75% 77% 77% 78% 81%
   
  10pm 11pm 12am 1am 2am 3am 4am 5am
Rain
 
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Snow
 
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Ice
 
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  10pm 11pm 12am 1am 2am 3am 4am 5am
Wind (mph) 6 S 5 S 5 S 5 S 5 S 5 S 5 S 6 S
UV Index 0 0 0 0 0 0 0 0
Cloud Cover 50% 56% 55% 40% 25% 11% 4% 10%
Dew Point 66° 65° 64° 65° 64° 63° 62° 63°
Middle Grid line 80 F Middle Grid line 75 F Middle Grid line 70 F Middle Grid line 65 F

Temperature History - May 27

more Historical Weather Data >
  Today Normal Record 5/27/2015
High 91° 78° 92° (2010) 86°
Low 67° 55° 37° (1972) 67°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:48 AM with 14:38 of sunlight, then sets at 8:26 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 12:16 AM with 10:43 of moolight, then sets at 10:59 AM

Herndon Weather Report

Tropical moisture to dampen Memorial Day celebrations from DC to NYC, Boston

May 27, 2016; 9:54 PM ET

Tropical moisture may put outdoor Memorial Day plans in jeopardy from Washington D.C., to Boston on Monday. more >

Fri. Migraine Headache

Fri. UV Index